Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a34c730d4217b6…

MALICIOUS

PDF

38.7 KB Created: 2020-06-17 00:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ff6f647539c26fb90aaad1b5eab4b1a SHA-1: e929ad62c2504febc013be3af338e490f3d90b2d SHA-256: 68a34c730d4217b651286eb81da9594dad3744448626e94540d0fe6f69df0125
96 Risk Score

Malware Insights

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

This PDF document is classified as malicious, primarily due to its structure which includes a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document masquerades as a "Hemmings classic car price guide" to entice clicks. While no scripts were explicitly extracted, the presence of numerous embedded URLs suggests an attempt to direct users to potentially harmful content, aligning with spearphishing attachment tactics.

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://46r.undesirable.us/uploads/1/3/1/3/131397930/131397930.html#hemmings+classic+car+price+guide
    • http://hcbw.org/uploads/1/3/1/0/131070761/79ace.pdf
    • http://webmail.mindmusclefitness.com/uploads/1/3/0/6/130620503/nefofexor.pdf
    • http://abigailtrejo.com/uploads/1/3/0/6/130639307/7800057.pdf
    • http://radiantdiamondscomic.com/uploads/1/3/0/5/130539344/fipemamelogitezis.pdf
    • http://clouttrain.net/uploads/1/3/0/7/130775897/seraba.pdf
    • http://mainelyprintpromo.com/uploads/1/3/0/6/130639450/lumereweza.pdf
    • http://mail.therootedphoenixshop.com/uploads/1/3/0/9/130969026/datojuxukos.pdf
    • http://technomathpr.com/uploads/1/3/1/6/131636755/jugesab.pdf
    • http://premium-cbd.us/uploads/1/3/1/3/131381464/gefilajo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000585f.bin
26da53735c3718e621581867dfb0689ca7f79e143308ddc85b96bf207f0fb2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585F 5048 bytes
font_01_sfnt_off00006959.bin
ba8fd389001369cab497083a0f631dcea358eccd87479a66e032bdd4ce480706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6959 10836 bytes

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