Malicious PDF — malware analysis report

Static analysis result for SHA-256 7270cfcecc2a74db…

MALICIOUS

PDF

39.2 KB Created: 2020-04-01 11:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5aa8f9e347bc73a3dc7152824d285025 SHA-1: bf438c5d7fb402f05b9a80f2936e8be5a6a39dd9 SHA-256: 7270cfcecc2a74db2d16df14b85e5d4c1a1c1c0d3f823014d0fcfa8bec6be054
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. While no scripts were directly extracted, the embedded URLs suggest the document's primary purpose is to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

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://tuxedorentalsnh.com/uploads/1/3/0/4/130489019/130489019.html#martin+luther+king+jr+quotes+on+leadership
    • http://frankstevensrealestate.com/uploads/1/3/0/4/130435697/tobojarisavuse.pdf
    • http://ksanieuwkerke.com/uploads/1/3/0/8/130814674/lusezanuturulaluki.pdf
    • http://wholesalerandliquidators.com/uploads/1/3/0/2/130288481/loludeluzonok.pdf
    • http://maketober.com/uploads/1/3/1/4/131437319/1722366.pdf
    • http://jacovmalul.com/uploads/1/3/0/9/130969595/lazuzurozamit.pdf
    • http://importmod.com/uploads/1/3/0/8/130874380/fanebebobid.pdf
    • http://mmgastore.org/uploads/1/3/1/3/131383973/nidugewira-rodadu-kubutenuza-fizafosuluj.pdf
    • http://thehalalzone.com/uploads/1/3/0/9/130969362/4765133.pdf
    • http://aquasoph.com/uploads/1/3/0/2/130288673/bipebelemogufa_nimitudejili_rigepexed.pdf
    • http://selinakolthek.com/uploads/1/3/1/4/131411600/jufevibuvoj-xiwumuvutoka.pdf
    • http://grandcruphysicianadvisors.com/uploads/1/3/0/6/130622101/piteb-vogojixog-xazoz.pdf
    • http://binionpr.com/uploads/1/3/0/4/130483903/138260.pdf
    • http://nyc-homebased-therapy.com/uploads/1/3/0/4/130436093/megilexaj_fenibalul.pdf
    • http://onvegetablesalone.com/uploads/1/3/0/5/130544954/f33100f76f2e.pdf
    • http://arquitectovictorhernandez.com/uploads/1/3/0/5/130588513/1017468.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f33.bin
23df139ebf5ce69dc06d0c41717998ac7b5e8167b65492338fc42f7c984e32bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 7880 bytes

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