Malicious PDF — malware analysis report

Static analysis result for SHA-256 f398213cf8308d48…

MALICIOUS

PDF

71.0 KB Created: 2020-11-11 04:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e848ac33b2e33a0974f501cbc8ee9ea9 SHA-1: d979f1ff37cdf9a823b02c244b62c605a7d3d79a SHA-256: f398213cf8308d483b05c3d2e9b71012c6fb5913c8ccf9aa4ddf8659bf82ecb5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?keyword=drivers+license+generator+ca PDF link annotation
    • https://ramowukegi.weebly.com/uploads/1/3/4/5/134508735/dobuvul-tepimudika-nujisegud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f9af83408edb.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/zibutifipexaji.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/1724297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f91632399842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/55a0404a-2b64-454c-9f04-9fd32e22f7a2/download_xfinity_hotspot_app_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615d9995-f324-46c7-b7fd-7cce257806b7/46735493387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc972661-977a-4f4c-a5a2-cb48596ea006/79926053377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91746a21-5922-438c-a495-5274e7151352/61159686450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6e382f-a207-495c-94fe-058b7a036b36/diversity_consciousness_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d69a5f1-66c3-4a17-be7b-e2e75f39311a/newspaper_template_for_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec59e6f-2ea9-4724-a483-ff55bb1df6ae/76345590102.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD71 4812 bytes
SHA-256: e7d4fe948041d57b9a904ecc3e974d85c5f2f1eabc10a0330c794a6e16bf7429
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 10412 bytes
SHA-256: 6113cff4a844ce2bafd81bbc74ab78b5a8ab95dab26b9aa7854e56bfb293edcd
font_02_sfnt_off00010161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10161 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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