Malicious PDF — malware analysis report

Static analysis result for SHA-256 7605aaf4b3397369…

MALICIOUS

PDF

76.5 KB Created: 2020-11-10 05:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: abb9d8e6657acc186026e4ab124ea717 SHA-1: daa32d4e04c73f9011319700eee23e65716ef4ab SHA-256: 7605aaf4b3397369284cff74aa333fa5d01e3a407fc78db21daf866062c9ec84
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 0.9998

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://traffking.ru/123?keyword=north+essex+county+registry+of+deeds+ma PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5fa162f11b321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f9a2d8cce080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449618/normal_5fa25aa235619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9060fbd7af0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f8f925629370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f93eef9ed753.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/taxejupozefeb-rufewodu-zezofowozebo-tupatokurisina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5fa9bf2a0d14f.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/78ff7b87-e366-44f7-9994-02ab040eef54/dogetedelapibetosugut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dddff2d-7ab1-4904-8012-143dc9118dc2/orosmayo_jujuy_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e5c1d3-6db1-4c27-a0e8-42eac27d656e/paradigm_phantom_v2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7e0877-f864-4a77-90e1-017cc23148ce/destiny_item_db.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c60a07f-faf1-4644-9361-ab5ed19585e9/lafotoxanipoxol.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 3

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_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 5540 bytes
SHA-256: 6f62deb7b82fe299773f372365f07dfe465e2303d02bba3e6047bfee225a1d4e
font_01_sfnt_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 10220 bytes
SHA-256: 8b773b0863d3d4d9521f0353e95d26ed3b603491d6da97f347aaf33f9bf4d3b0

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