Malicious PDF — malware analysis report

Static analysis result for SHA-256 007fef740e2a05ab…

MALICIOUS

PDF

107.6 KB Created: 2021-07-01 09:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9ef12e0039b425718819242190d60444 SHA-1: 1c59ba66d7fcb23df432a900362c70565723d58c SHA-256: 007fef740e2a05abbe5d6fb1602a37632e45e946bd763c6653865819f30daa89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The document body is heavily obfuscated and does not provide direct clues, but the presence of numerous unknown URLs suggests a distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97c7b1a314---wafep.pdf In PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/gewomoduxemarezekukexir.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7edc2019ea5cc3430546e36592907ac5/juxataxovo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e2960940b0a6ea80d56298068038727c/52171274242.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d2c74f6d---muxarafidipemekuvopepej.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/67640370382.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/krmr8o1hdqrr4art40jk4a84k3/60628824420.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/zakitewuxojuropek.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/089b9309b2d138570c695ff792504369/rajudikiguzadiwin.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a16250f7a---xonitigukaba.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/waluxobezax.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/jifufatewolapejitil.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/savetik.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/49817889486.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/10135862817.pdfIn PDF document text
    • http://christopherdallo.com/file/jiwositubiv.pdfIn PDF document text
    • https://werbemittelag.chupload/file/26769152752.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/rafigi.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/aa190c2729eae4ab43e027fbfcf41fb3/foniditexazo.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e9c640770200aa0ecb284534c3e22cfa/52642221952.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ed58b7317e0c59493e87829adcc95a09/16875927258.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/vugqioamsiv0t0dl5n2k1hcda3/dovukutenexavaxakozifubuk.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/39204325136.pdfIn PDF document text
    • https://inncredel.com/uploads/lemafuroledijetozolen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=7+square+yards+to+square+feetPDF 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_off000144bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BD 10420 bytes
SHA-256: db7d414004e66d7284006afcd678f585c643c8656e557a84a355cf4af82ee539
font_01_sfnt_off00015c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C59 17172 bytes
SHA-256: be1b48daf831e3243ad18679b8bde123f225c3cee01ff6288afc38cae1c5e40c
font_02_sfnt_off00018934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1