Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60acfed1f42d706…

MALICIOUS

PDF

138.0 KB Created: 2020-11-28 00:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 02f17db65445b1bcb14300109e769c41 SHA-1: 1fc2a0df3fb201cd903e73b05af5f7886b650bb7 SHA-256: e60acfed1f42d706d649068969234b7f7bd898ae59ab7df3f7cc015f66eb41fa
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=bumblebee+dies+transformers+prime PDF link annotation
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/a1b9114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5fa0658a3e874.pdfIn PDF document text
    • https://poriveba.weebly.com/uploads/1/3/4/3/134316211/1850668.pdfIn PDF document text
    • https://vibokijejegol.weebly.com/uploads/1/3/4/7/134756418/reresazejase-rorix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_5fc17996435d0.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/9b70d1af-e891-4474-90c3-3b0aaaa9f7fa/wixulufesojonizepakila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b99c7e-650e-4621-9dc7-91d7274c0869/69175738912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c398fb-164b-4b27-bdb0-fc0eea3613a6/minecraft_seed_hunt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4349fa80-ec15-4b0b-8725-d9fb8ff36a27/soplo_austin_flint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131520e5-f5c1-4340-91f8-e731fd31678d/58268331649.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/india_vpn_unlimited_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/tuvegufef.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_off0001d443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D443 5260 bytes
SHA-256: c868f5b41490f0b35e648448ac0900f877e5d2e45fc1076285495a2d717bf11d
font_01_sfnt_off0001e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5FD 11568 bytes
SHA-256: 5903a6d19a4e8c481e038734b6522e257aea807f1bca243b039a42dbba329df3
font_02_sfnt_off00020cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CEE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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