Malicious PDF — malware analysis report

Static analysis result for SHA-256 071764c687dd74e7…

MALICIOUS

PDF

73.1 KB Created: 2021-06-09 12:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c324e667d5d98328a14af7c403d416bf SHA-1: 0a5b7c530167f665cfbce67b80ec011ce2b741ae SHA-256: 071764c687dd74e781e46b30d0163a29ada11dd2af934ad53f4ea5b570ead01b
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of a 'download button' lure further supports this, although no specific script was extracted to detail its exact function.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/pbw?utm_term=future+special+mp3+download PDF link annotation
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/e7c4d1c6ad.pdfIn PDF document text
    • https://zogiwabut.weebly.com/uploads/1/3/4/3/134364715/makomukuwatoguzakuf.pdfIn PDF document text
    • https://fosuzotarodaduv.weebly.com/uploads/1/3/4/3/134391180/farom.pdfIn PDF document text
    • https://didunomupipopad.weebly.com/uploads/1/3/1/4/131438203/9314681.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/nalonom.pdfIn PDF document text
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/176d0f513dd.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/rajemok.pdfIn PDF document text
    • https://savozajit.weebly.com/uploads/1/3/5/3/135320594/3da87850d90edd.pdfIn PDF document text
    • https://xuzelete.weebly.com/uploads/1/3/2/6/132681171/dupipanajoneliz_tixorumexikomad.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/b337ed.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/tuzaxeminuzar-tivijanu-valivesakidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144671958/78227660773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27bfc23-486b-42c0-ad1b-aabdab2c65fb/72791866432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a1e497-9172-41e2-a185-73ea6902162d/freddy_fazbear_pizza_real_animatronics_show.pdfIn PDF document text
    • http://gurilotav.pbworks.com/f/personal_ledger_account_format_in_excel_free_download.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/42228505402.pdfIn PDF document text
    • http://jowenoxo.pbworks.com/w/file/fetch/144881523/hl_ahuja_advanced_economic_theory_microeconomics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07909402-420d-4678-98d4-ca1563828994/660937642.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144736131/10815084764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b4cbe2-8445-45a2-bfb7-7aaefa6a9c6a/47921439228.pdfIn PDF document text
    • http://fajopab.pbworks.com/w/file/fetch/144619518/labimixolutujud.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 5432 bytes
SHA-256: fed88d47f27fb4b14a051abcb9947bb62c23d7cb64ec99310c438993772a7579
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10484 bytes
SHA-256: bdb5c33f92b4d58e8312c7f43ec2a4f76a14acb11f0a9c0e3b210e2b1d3d6125