Malicious PDF — malware analysis report

Static analysis result for SHA-256 05aaba63bc31ca5a…

MALICIOUS

PDF

39.1 KB Created: 2020-05-22 03:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d10d32cfd0d7443e784cb1b6d1f4466 SHA-1: 19c6ce4ebb62bddcf3462046e00fcaa825bfd73c SHA-256: 05aaba63bc31ca5a3ae8d7387a3cdfe047cdfec61a7af65aba05b75aa0a73c8d
96 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body, though partially corrupted, contains a reference to 'Intuos creative stylus 2 reviews' and includes a URL that appears to be the primary lure. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the structure indicates a malicious intent to redirect users.

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://74-123-79-31.mgwnet.com/uploads/1/3/0/7/130775646/130775646.html#intuos+creative+stylus+2+reviews
    • http://caliberpt.com/uploads/1/3/0/9/130969587/b9edfd50f77.pdf
    • http://shopjustforsport.com/uploads/1/3/0/8/130814681/pelokumomilapumufab.pdf
    • http://creativeacquisitionsgroup.com/uploads/1/3/1/3/131398447/5707020.pdf
    • http://arsec.com/uploads/1/3/1/4/131483348/acf3948848e2fd9.pdf
    • http://infocusgt.com/uploads/1/3/1/4/131408371/mipuka-sasujeboz-pipiwipetupu.pdf
    • http://smith-re.com/uploads/1/3/0/8/130814423/xunofa_sarewosiwive_bubakifo_gagagi.pdf
    • http://charletsweb.com/uploads/1/3/0/2/130272985/nekoxoxinet_xipojuzib_zufodopezov_vawinol.pdf
    • http://dcsgeneralcontractors.com/uploads/1/3/0/5/130550925/ffd39f2e11a1.pdf
    • http://jjmyersconstructiongroupllc.com/uploads/1/3/0/7/130776393/vizibe.pdf
    • http://simonerichardsbooks.com/uploads/1/3/1/3/131379530/sogetibuwapo_namiwuvevet_xowulu_xanalolewumebab.pdf
    • http://querida.org/uploads/1/3/0/3/130323647/kegefuweze_jubagigato_wexipojafilux_womimubo.pdf
    • http://hbeatz.com/uploads/1/3/1/3/131397981/wetilusapota.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00006c25.bin
ac02778720fc95105860eee7e901c238adb9bf4849331229b1b1377540eac357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C25 10964 bytes

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