Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d30f32351a02466…

MALICIOUS

PDF

39.7 KB Created: 2020-05-20 04:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04bbe4778e623f772f3f1e3b3556d411 SHA-1: f8ffd1955bbfb700dd31f5bbbf9ce62d9e63c39c SHA-256: 0d30f32351a024666a14ec7ab63febee0a3ad4fff7d03daa8f053c6f0aaa0aeb
156 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 host malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document attempts to trick users into calling a phone number, a common tactic in tech-support scams or callback phishing. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a malicious document, likely a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://wishbonegallery.com/uploads/1/3/0/2/130288468/130288468.html#tbs+verizon+fios+ny
    • http://ratply.com/uploads/1/3/0/4/130489522/6360408.pdf
    • http://scoonies.com/uploads/1/3/1/4/131454523/lenoxoraralixuw.pdf
    • http://tnmountaincabins.com/uploads/1/3/0/6/130620690/9830845.pdf
    • http://esoterictribe.com/uploads/1/3/0/4/130436306/duzametugasojif.pdf
    • http://cencalpgf.com/uploads/1/3/1/3/131383892/51a8fd53284bebc.pdf
    • http://fashioncraze.org/uploads/1/3/1/4/131407890/1950285.pdf
    • http://fantomair.com/uploads/1/3/1/6/131636872/rebosunutag.pdf
    • http://metuchendentistry.com/uploads/1/3/0/3/130323601/welodabesesivexu.pdf
    • http://esotericindependentpublications.com/uploads/1/3/0/8/130815303/9480779.pdf
    • http://americanational.us/uploads/1/3/0/2/130289755/vezisinorowelof.pdf
    • http://winebrake.us/uploads/1/3/0/6/130639583/fukaferitaxo_xesazowogef_rofupubenumo.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_off00006c6b.bin
7e88aa5285b6dda978021ef45accfafd9d639749de463e2f5c3a5ddbab8f40bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6B 11704 bytes

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