Malicious PDF — malware analysis report

Static analysis result for SHA-256 585ea904994fcec3…

MALICIOUS

PDF

70.8 KB Created: 2021-10-01 02:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: e064e7c155caeb3672e4e643fd0285f9 SHA-1: 9245d52c75233033198348643eac702e40294c25 SHA-256: 585ea904994fcec327ddc2939ba6ba1736a89b9958cdbbc64636dbde1d398219
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=11th+physics+record+pdf PDF link annotation
    • https://easypayindia.in/userfiles/file/299656994.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/53868736455.pdfIn PDF document text
    • http://volamthienha.top/userfiles/file/faxaxupififowobivefifa.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/653487634cd569d431e6f1fe8ab6193f/bunuj.pdfIn PDF document text
    • http://hijoin.hu/editor_up/kogojilipexipefezerupobux.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/dirolupuxatulep.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/somujowebofuvigajezas.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/79317291870.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/lapixakoxegamilaso.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/87625225806.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/0cd5a08f476ecee66bbfb9faffa1fe6b/91763007564.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/megitep.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/walumipovurabobudewetoji.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/22867642917.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/04038c94ca29a3a51f846b0c0213775d/purivapesuze.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/3556039470.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/kogesilewozekifabijov.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161456070a4d10---giwetugibavibawijoluxejin.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/90006754097.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/sisejoviwekezekiraxilup.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/1357924696.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/adbdbfb6831a8945f28e3fc9270cf3bb/bovabuvekefirolulope.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/tavuvaxemowexodaso.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/fizum.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/vibevivepusufezunoru.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_off0000b5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCA 15456 bytes
SHA-256: d5d6338f1c276a59198809adb7b088ce9ca95d7bbc218a03305acd3918d6b6f7
font_02_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 10472 bytes
SHA-256: 87115b399df53146c4b8549061d79e42d4bdf3f200ba3046bcd32eb9435372c7

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