Malicious PDF — malware analysis report

Static analysis result for SHA-256 db04bfa809336919…

MALICIOUS

PDF

68.2 KB Created: 2020-12-04 05:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 128b5a717e3a8712576e7d62f610dc2c SHA-1: d605023a583a52755da6e704f9566e8797bb4361 SHA-256: db04bfa8093369190b6f1118878798c5f93a83601d0a2f1ddca7cc7c5cf0069c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest an attempt to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?utm_term=template+wedding+invitation+video+powerpoint+free PDF link annotation
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/vevapasem.pdfIn PDF document text
    • https://xukoxaxap.weebly.com/uploads/1/3/4/7/134748194/7452915.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/88400692d7.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/zepigepetedekego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc14640df132613bbc04837/t/5fc2c20af3de5e49b5bf4d4d/1606599178777/wakijukosotukox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1cbe78ef7301f8b171054/t/5fc981b5be6684539de03033/1607041466087/nexufawigegarefeki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10dd611f6a419848684c6/t/5fc1be689d79364840ced182/1606532715334/buzupebe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d48fa04221c7116b6e9/1606372682999/zojulumuzejusepopetivun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7090fb95-7309-4478-9290-2056eaa7cb03/sims_freeplay_mod_apk_unlimited_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d04363-dcf5-4983-a680-e33d306eaa16/business_development_plan_examples_banking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ec5f7d-e891-48e6-8a5e-df638c2b6b19/tarele.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff2111f6a4198480a438/t/5fc1c97918e72e5fdb1a2a0d/1606535547261/inscribed_angles_and_quadrilaterals_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55680104edf1d779e9a83/t/5fc793a21d689b68bfa02397/1606914981625/fafat.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_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 5284 bytes
SHA-256: 9d65c16a82883e89805950eed4bb2b8e91a3865cf8a0de9cace51f0867c3bc4d
font_01_sfnt_off0000df4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4A 10632 bytes
SHA-256: 376733dc06080adc6271831acda9773eb42045ffd7b7917ddc041871fd816fd4

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