Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda354bb505bef59…

MALICIOUS

PDF

38.3 KB Created: 2020-05-30 02:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3b7c07a2b8ec2c451383278b66e9f0e7 SHA-1: 93ec7db88497766b6d153177f5f86581ce3f7b5c SHA-256: cda354bb505bef59dfc2b33fb3c8340df300ac92ee78c68cfbb4059ce0ce6e61
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a likely attempt to distribute malware or engage in phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://q2.undesirable.us/uploads/1/3/2/3/132303116/132303116.html#this+blinding+absence+of+light PDF link annotation
    • http://excellmeeting.com/uploads/1/3/1/8/131871456/mimeg_vepemorala_vanizo_kuvuwekiwib.pdfIn PDF document text
    • http://adtest.site/uploads/1/3/0/8/130874101/2d1eec1ac2ba8f.pdfIn PDF document text
    • http://riskjuiceextractoruk.com/uploads/1/3/1/8/131871633/gigexa.pdfIn PDF document text
    • http://louromartinsadvogados.pt/uploads/1/3/1/4/131437116/6356987.pdfIn PDF document text
    • http://k23partsandequipmentllc.com/uploads/1/3/0/3/130379083/2872816.pdfIn PDF document text
    • http://wildstreamstudio.net/uploads/1/3/0/4/130483745/xepobazububaze.pdfIn PDF document text
    • http://westgatefleamarket.com/uploads/1/3/0/6/130603917/8113879.pdfIn PDF document text
    • http://mundenrealestate.net/uploads/1/3/1/1/131164153/bonofuxelefoluboza.pdfIn PDF document text
    • http://odisg.us/uploads/1/3/0/6/130620836/fimitonil-gepirawanoturuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 11044 bytes
SHA-256: 64eec6daf0d34211f5be4362d7a8bc2d2a5c37a093ee86dde8574771bc48c75a

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