Malicious PDF — malware analysis report

Static analysis result for SHA-256 7114416785b204e8…

MALICIOUS

PDF

46.1 KB Created: 2020-11-05 23:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5f5492811b6ec4f2545f84fb8913c806 SHA-1: 146741520d4606d047762273b1ef6dcf9a776125 SHA-256: 7114416785b204e8f996af0f8d3654016ccd1183586aed1b8ceba0c795109be9
96 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 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 1.0000

Heuristics 4

  • 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://trafffe.ru/strik?keyword=blank+2020+calendar+july PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f9475b924104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f9468fad8c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5f9c96756d504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f9a445c29889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5f99cb3fe4480.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/750c01f3df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5fa3a4346ae5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5f9da85d62e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_5f99063ad5aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f945e6c49e7e.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://s3.amazonaws.com/jeponowon/62289396659.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/27189502574.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/vanilla_wow_macro_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/lugib.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 4964 bytes
SHA-256: c98b26be03a278629f552ed3b4a81c017e5723f8e44e5cbf4621d2e2dc5b2ad9
font_01_sfnt_off00007b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 10012 bytes
SHA-256: d276657738b5c39c58e7faa8d01df69640bd2aaa15265ca2cfab8f40b581d9d4
font_02_sfnt_off00009d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D76 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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