Malicious PDF — malware analysis report

Static analysis result for SHA-256 a708fb6127888371…

MALICIOUS

PDF

83.0 KB Created: 2021-09-12 07:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cafc12984d696117bd1bcaf1c1f31d2e SHA-1: 277b5963f85a513d3488ee2c5bc400555222ed7b SHA-256: a708fb6127888371ce0d40ac67da197511ae8ddf3f11c48ca41e7385d88a67ab
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious payloads. The numerous embedded URLs, many pointing to compromised CMS uploads, suggest a distribution mechanism for further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • 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://queure.ru/uplcv?utm_term=jomonte+suvisheshangal+torrent+download PDF link annotation
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33a59382524cfe34bbe6b0b67c0e935a/gegukovivevum.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/38779985671.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/xogojanetoluxojono.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/liwawuk.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/87519761835.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/xejejomakukexivuponugo.pdfIn PDF document text
    • http://headrepublic.pl/images/files/10976563358.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/munefa.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138b7b66322d---nudegadawixikepaluniw.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/vumololipifigixere.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/90569914671.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/39070375528.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/dodirorirewub.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210903064831.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/be6hgo41pv8u39adrlofvga0q6/puxufipewo.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/merijuxolarugawu.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16134375d7fc98---27635549187.pdfIn PDF document text
    • http://cudicio.it/images/file/19066588169.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/menitopijemadu.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/37544660413.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/58363906840.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/pewowi.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/52539717569.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/gujavomipemunuzovo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 18248 bytes
SHA-256: 1b54ed4b43acf4b3655347c3abfe39a336411b180037c8994af7f5bff85b0df3
font_01_sfnt_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 10936 bytes
SHA-256: b9494faf488c6bae25fbf00e511182780dd6e9c2276f08b1700fef32f3b4f752
font_02_sfnt_off000126cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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