Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed54dfffa8bdae3…

MALICIOUS

PDF

91.2 KB Created: 2021-06-26 03:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41e1df18de8319afaa4829f9ca071d59 SHA-1: a15e9603abe4be51206b64085cf1f0e12e9b12de SHA-256: aed54dfffa8bdae3cd548653f489d95e905dfb6fa26a150ef3cbbf345f6a02de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a deceptive structure that mimics legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://bensonlandscape.com/editorData/file/vejojirebegesada.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e70f0db7d4---2862751972.pdf
    • http://timandlor.com/userfiles/file/wikadav.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/aa117a4006467bfa5d1691066aee55c1/22063655263.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d3829b33e9c758025726c408b2bcae6d/68104411410.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe3e9b9884---wapabopuwarefubebefanejix.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd2a2cc5e---gaxesof.pdf
    • https://tsegypt.com/file/givegigor.pdf
    • http://albertopizzetti.it/userfiles/files/memirod.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d012cfb5b82---69294452915.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/47712860408.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7c05505b4feb9b40e8c86605450b3c2f/fafowe.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/wakewisesuziredetatudul.pdf
    • http://amandatravel.com/userfiles/file/jifutipuwazamovebit.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/250cce0c0d5d6784849e1e2bd8d8c11b/31006291185.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160750fe9223ec---tasiteji.pdf
    • https://bleikss.com/userfiles/file/kezanopixebabolotoxezujep.pdf
    • http://terezmisszio.eu/files/file/defonuzudusabunuteforalim.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f6f7dd044d0e6133b2c92bb0dd6610d3/57710654907.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf10f2652---xiwaxugixeperigi.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/qbptem7ufraemups76sgn1oh93/90926129443.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/9672ab736ed70113341eaa6eb4bcab57/bofuzopabes.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086045065758---94778386284.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=research+article+on+customer+satisfaction+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe01.bin
eae6ec3835ab81fe8d3f657be6bc121b73b43b7fd30ce22e081a931d06b6c26d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 11028 bytes
font_01_sfnt_off00011777.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 16792 bytes
font_02_sfnt_off00012f89.bin
cd0091e52d8371bfa6c1eab17087b4ad81e494ee0ee4d79faf9546addfbede4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F89 17724 bytes