Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0412c1ee3b88ab…

MALICIOUS

PDF

85.8 KB Created: 2021-07-10 05:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 59f7ce0a4a1fb4b3de765942651cb35d SHA-1: 3c3fe0f41421955a97f27fb7267ff705322ed553 SHA-256: ef0412c1ee3b88ab0c24c1a7ce7e6f68d88f88da319cc98b921df056f3fd694e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous links to external sites, some hosted on compromised CMS platforms, and employs a visual download button lure. Crucially, it instructs the user to copy and paste content into a shell context, strongly suggesting an attempt to trick the user into executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=among+us+pc+download+torrent PDF link annotation
    • https://acryl-bg.com/userfiles/file/musunuxefizatage.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d6080cf3c1e---wijarodumogalitarofejura.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/zixowedifajulekabowawo.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/93299601735.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/61886834664.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43db6157b---ruzegasefetaxepike.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b0097cbb23903b883f26a7773e88329c/vujitu.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/55211aa407e25cbe7284473f93ce3b2e/puwinirejudavexuluvo.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/81331207206.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/magitotupukem.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/kimanepug.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/78990701994.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f21044bc9b---ginofilopafalapavisizib.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/26320215250.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd2c55a7ea---40406115669.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73947d1e7c---37294497049.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/59452827211.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ec3edf620---72711169640.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/n3ab2o9mes7j44us2cgkvjl1c0/94716952513.pdfIn PDF document text
    • https://menu2uplus.com/images/file/68120982604.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cpncq4iegpo4alg9o1f3gv39sm/nupidafugoxomafa.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210625_BE626A0911D72072.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779434b361e---61588730718.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b231e0aec70---64190064646.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/afadeaced1eaa230202fbf318be961b9/burizemufafe.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/43350742963.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 16932 bytes
SHA-256: f1a6a879c645e507113292db16208ad70d2a909fb09b291aa32e6788b80a325b
font_01_sfnt_off000118b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CD 10932 bytes
SHA-256: 3e20b2af8ae6d6f49bedd823e242a4738b251c8786d872bce4f476097ea859c9

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