Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8295338c3dfaaba…

MALICIOUS

PDF

74.9 KB Created: 2020-12-28 15:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9cc5652f2a209d031fe7f7a58be4f6b7 SHA-1: 543c5cad74540a4cdfe8f8c31c86a79bc6b66121 SHA-256: b8295338c3dfaaba9891cd03ab7e4d35e7c7524c4c563f09c59d567c9f63ae9c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/23542f3272379f.pdf'. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=the+point+resort PDF link annotation
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/23542f3272379f.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/iVcmhfU/26290740343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/addition_polymerisation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2f8f0e-a8aa-4c00-94e6-829182418b12/vanuxizovosiluriju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedf9c4d-77d0-4078-bd01-302263586714/6589614975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2577ae-1fc5-406a-881d-13c9a3a2566e/juronexomubotonogiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298daabf-e3b4-4666-b1df-c97ddd3eafee/las_venturas_gta_san_andreas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d096b1d-c8ed-47b5-983e-484675037b9e/pidexisudiret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8068d1a0-b21e-4b60-b286-549506bfaec2/wokuwidenapunalitafek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d59f29-acd1-4e79-8f6a-faeb5c026c28/xirisabaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e026738-ae02-4c0c-84c4-fb5a60dc08a7/95153876783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2eb43eb-f03f-41cd-a267-7993b3f8f5f9/talking_black_cat_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7575db54-5f75-497b-a66f-222c47d327ec/93988870317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20de5dd-b2ea-40d8-b693-73ffbd079f73/channing_tatum_shirtless_cardboard_cutout.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_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 4616 bytes
SHA-256: 8716d611f8659976fb51441d32c5bc60ab52a1095cb9753faac039647a2ba145
font_01_sfnt_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 11072 bytes
SHA-256: a27744b1cfd42dcd5c18e57f52ab033ab201e39a7d8fb83883284e4e454fe0e0

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