Malicious PDF — malware analysis report

Static analysis result for SHA-256 664f0fc09f7f1f98…

MALICIOUS

PDF

36.2 KB Created: 2020-06-05 16:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09c0d444934b18fbc2319b2369c21dbe SHA-1: 508a7e82354c170dd600b045b7fd74ba746b07ea SHA-256: 664f0fc09f7f1f982bdc213bda6db3e3ec32ae464f0a6e2dac6392ad5e460a80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to obscure malicious activity. The document body mentions "Renault pin extractor 2 download", indicating a lure to trick users into downloading potentially malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs supports a malware distribution or phishing attempt.

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://74-123-78-37.mgwnet.com/uploads/1/3/0/5/130543240/130543240.html#renault+pin+extractor+2+download
    • http://armmasi.com/uploads/1/3/0/3/130323724/sujarewewakelo.pdf
    • http://snowestates.org/uploads/1/3/1/3/131378850/b2ffb994d.pdf
    • http://regenerativelearning.org/uploads/1/3/1/1/131163712/4090401.pdf
    • http://74-123-78-37.mgwnet.com/uploads/1/3/0/5/130543240/terms.html
    • http://74-123-78-37.mgwnet.com/uploads/1/3/0/5/130543240/dmca.html
    • http://74-123-78-37.mgwnet.com/uploads/1/3/0/5/130543240/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xenexusese.files.wordpress.com/2020/06/latulorosizilajokip.pdf
    • https://zipovakolo364097725.files.wordpress.com/2020/06/gaxiv.pdf
    • https://xiduvavaj.files.wordpress.com/2020/06/tijojitage.pdf
    • https://tuvakula406676748.files.wordpress.com/2020/06/90713564766.pdf
    • https://bebeleg.files.wordpress.com/2020/06/99401072079.pdf
    • https://lamizawozaf.files.wordpress.com/2020/06/votokugofanokeloliwe.pdf
    • https://masajironat.files.wordpress.com/2020/06/31157063290.pdf
    • https://banibejazona.files.wordpress.com/2020/06/36858144243.pdf
    • https://sakeweter812408916.files.wordpress.com/2020/06/27330667722.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbb.bin
d7aa9386ada04996d403b83a73c77e76ac9e27bc9744583e04fca48973789cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBB 11024 bytes

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