Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcff10e232512e6…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 18:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a30f5b3bb04915d76a74e492f919459c SHA-1: 0c3e412036422daaa5504afc3530ca090d4db369 SHA-256: 3fcff10e232512e682e8167639518eaf1c060531f459450680cfd60fb214a6cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9503553c1---71434171292.pdf In PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071636a71ac9---ropukapetedujapuxesujubez.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/70441911062.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/47382942431.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/86195222503.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a31edf2d424---73429968136.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/97509172109.pdfIn PDF document text
    • https://patc.fr/imagesfile/wutomefoduwef.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/96193180503.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/88123b33bae3e0b851be88a13d9e7a99/79301267908.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/98377008077.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/27215812502.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/mirasazij.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160aba074a9478---vijodowozexejijupoded.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/bexukitenajofapesorum.pdfIn PDF document text
    • http://bensonhigh67.com/clients/55910/File/6833035516.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9e21a43a48dda8753c43301e5d5a182a/67458051550.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade8555405---xofefexobono.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/56197713038.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/foteponupine.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/jimezujaxikaves.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/wasomisewisekizedaxuw.pdfIn PDF document text
    • http://kleiberit.ru/files/file/85809029516.pdfIn PDF document text
    • https://anfauglir.com/images/file/leteri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=metodo+no+experimental+pdfPDF link annotation
    • 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_off0000d594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD594 10588 bytes
SHA-256: e5a70512ac81e8bcfd489c2394322e8b528835e528751cb3221c2c28bb4a7354
font_01_sfnt_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 17752 bytes
SHA-256: 07c5531cc67027b754fa51685c4bbab6ebd6b9a46a55ca42e109211b761df327
font_02_sfnt_off00011b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.