Malicious PDF — malware analysis report

Static analysis result for SHA-256 90166208e04d568a…

MALICIOUS

PDF

35.8 KB Created: 2020-04-11 08:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 497934c751d91a8cb5e64d93a55d370e SHA-1: 3a98bcf9605f1ec0338010a36c8a7d527913f317 SHA-256: 90166208e04d568aa59cee88189b2907bec33dcadb61c30d39b0068cb83614bc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a mass of external links. While no scripts were extracted, the presence of numerous unknown-reputation URLs suggests a delivery mechanism for further malicious activity.

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 http://lamee-dark-version3-de.devsite-1.com/uploads/1/3/1/1/131164090/131164090.html#best+knight+build+dark+souls+3 PDF link annotation
    • http://easyauctionshipping.com/uploads/1/3/0/5/130588744/wijipubizowotuw_vokowofamevet_duvisazedujil_modesewidod.pdfIn PDF document text
    • http://homeware.biz/uploads/1/3/0/2/130273987/1210194.pdfIn PDF document text
    • http://dovetailhouseworks.com/uploads/1/3/0/3/130379381/muxumedefajepaga.pdfIn PDF document text
    • http://kitchen4.net/uploads/1/3/1/3/131381411/7691727.pdfIn PDF document text
    • http://chinemassage.net/uploads/1/3/0/9/130970023/bovuduvaxunesu-jawirukeri-jagekumafe.pdfIn PDF document text
    • http://thinknosis.com/uploads/1/3/0/4/130483863/5505225.pdfIn PDF document text
    • http://fajocreatives.com/uploads/1/3/0/7/130739661/muribep_gufoxurawajel.pdfIn PDF document text
    • http://mta-sts.mail.redbudpartybarn.com/uploads/1/3/0/8/130874493/viputovosose.pdfIn PDF document text
    • http://strongholdequineequipment.com/uploads/1/3/0/2/130272902/dejozawon.pdfIn PDF document text
    • http://thekreativecard.com/uploads/1/3/1/3/131383553/mawovipubolusepuno.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E2 8200 bytes
SHA-256: 83dc86e76df7b656f2d21fb15be8c8e8a4b5144219cd883f8c8d8feec3c0b77b

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