Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76267658430a916…

MALICIOUS

PDF

87.9 KB Created: 2021-07-31 20:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 39a3fddcc911251b7db83d047b5ec3f9 SHA-1: cd93bed118fd4cd0bf7b06078103c12ae3cdca21 SHA-256: a76267658430a91676a344839c8ac8cb37a2f6ad15d0c02d03fc33f6692a695b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=warm+bodies+full+movie+download+in+hindi PDF link annotation
    • https://iasvn.org/Images_upload/files/60608501682.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/xitobilisanuwiserev.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/surumumexiruguxexil.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3e57f854b66c4de6bc15adbadddb2303/89338138309.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a3d3e12496a4f499f181f874fd29628a/52821433833.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/kebigekimivemizejugagisa.pdfIn PDF document text
    • https://securitydm.net/slicice/file/mozinogasakexomuwogibewa.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/d0a7fbf62e5ae7b36c184dfc2515c7ed/mekoxora.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/23245417523.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/3191af8784fb35572b42435fbf6e9047/livaxufoninorajiruxa.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/nixeretogopineloxatus.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f01369ab34---bovefifegobanuxaze.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/sepojasoxijuna.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098759e34ce3---40263680042.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/q0e1vu7p5p1obgegao08p5t7uv/54123674302.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0affadb5b4---dowetinutaw.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0b34ebee5---zezilelekamolinetezameko.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/40272914611.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_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 17096 bytes
SHA-256: 5927c0241b9e32133a43fe1c35b613d151eb1ddbf9d9bb19d77da926a890e3ee
font_01_sfnt_off00012026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 10904 bytes
SHA-256: 897a07190f00548ec81b47e54b3717153ed0df97d73147c738b70373fad058ed
font_02_sfnt_off00013936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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