Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6eb924ba08c40d…

MALICIOUS

PDF

78.3 KB Created: 2021-09-01 04:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6c2942dc96f700d999fc59e3fecc68ee SHA-1: ca847a98686b1fc67d179f91713c4324fd4fd292 SHA-256: 5e6eb924ba08c40d546b64f618acdb9578efaef0786ad2e731ca2d839f0a4201
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of external links and the overall heuristic profile points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://inwebjor.ru/uplcv?utm_term=how+to+use+dream+whip PDF link annotation
    • http://mariopresto.pl/userfiles/file/gudebane.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/fuxarojota.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/e12vq4f2hgoc6mqu94t08dq347/weduxima.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/modawawenibukuzuz.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e87d9ce5e1e9d7a3a147d192506f3bef/mozevanogulijunora.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/vukogewulibipibu.pdfIn PDF document text
    • http://anm-av.de/uploads/files/lowesanelukatozifitisi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c74d72d0627---lepasusav.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609a02f4af37e---bimotadexaxavarukuror.pdfIn PDF document text
    • http://infunplastic.com/d/files/ratagaxi.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/45125706799.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077e0f02294b---2012152481.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/7692233168.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/06d161b1fecd06a70dbf1cc6d0404215/82044334881.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/k6ta3qlm6sof5fpscmqnsfk0g7/lutadagalukabexur.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/kefixaninusonipofopugolav.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/79315120261.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/gubetofewexezurotuxu.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/73640961011.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc8bdedb88---95946127306.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4efcf30272ceba14523f99dcab524390/25768784396.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/foliwufanijobowogop.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qi0at2e2c8fkr3gdsbmt3mc2u2/tuviwolo.pdfIn PDF document text
    • http://clingac.com/d/files/229553206.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/d2469f44af77400776317fefb0a81ea6/vodagimelofebiparejal.pdfIn PDF document text
    • http://dyweisheng.com/uploadfile/file/2021072414511473499.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_off0000ce15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE15 17116 bytes
SHA-256: 7d7ff5b2748a21bc6d838c51a5eb524a4fbce21a34ffd6d93a9d5e055c1eba8f
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 10684 bytes
SHA-256: ff3bc484a0d2174856d4af9d3a40f39d58d5c90e5a806d9734385700781037f7
font_02_sfnt_off00011307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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