Malicious PDF — malware analysis report

Static analysis result for SHA-256 3274b6db57acb5a3…

MALICIOUS

PDF

85.2 KB Created: 2020-11-13 00:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0ea04359a61404031d3ae31b344f5bb0 SHA-1: 14d8a68807816fb9a2dee0797281c7671ad39529 SHA-256: 3274b6db57acb5a32d547cba058fbdc589e5a674b48949b06c413a9e41c747a8
186 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 0.9998

Heuristics 6

  • 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.
  • 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://trafficel.ru/strik?utm_term=wotlk+rogue+pvp+guide PDF link annotation
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/fa8934d.pdfIn PDF document text
    • https://kepamimap.weebly.com/uploads/1/3/4/6/134609022/2165738.pdfIn PDF document text
    • https://fuwizugirizuj.weebly.com/uploads/1/3/4/6/134611345/6595141.pdfIn PDF document text
    • https://jubonofu.weebly.com/uploads/1/3/4/2/134234671/056f1.pdfIn PDF document text
    • https://pujawuto.weebly.com/uploads/1/3/4/5/134588096/rovoxitalaj.pdfIn PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/sunolagan.pdfIn PDF document text
    • https://bawujepal.weebly.com/uploads/1/3/4/5/134515469/rutibolelo.pdfIn PDF document text
    • https://zisowuwaxafo.weebly.com/uploads/1/3/4/7/134700917/4eb63fd67a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de01cdfc-b64e-4aa6-8913-76157f998776/disolozuxifuwefepakuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1602cdad-bd01-4c23-9720-53026a48555b/gaxusibubepipezazubaruwen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23094c6c-c264-41d7-a981-c05a6f67a522/79641715121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53e1356-e29c-4235-acf1-8a4225f3697f/irrational_questions_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/53408491605.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/raweke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b057e147-019a-4724-9828-71c8d5d80d88/duwoxisezil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430cefee-99a5-4bd7-8bfb-6f648a3d4e31/22846467794.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 4876 bytes
SHA-256: 346e56ccbb00962401f7ae0b1d168a3f41ba98b16906537fa9575513a8fd0bbf
font_01_sfnt_off00011dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCF 12888 bytes
SHA-256: e3b707f9186208df6c872024ae2895e7fb8c8b30a2ca9a77736e859cd3b3c4da

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