Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcddf9dbf076afa…

MALICIOUS

PDF

42.2 KB Created: 2020-04-11 07:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8b5c829446d506260a048fbcb9ce350a SHA-1: 4717b7f374164dd038a5c175bf7351f635280161 SHA-256: 7dcddf9dbf076afaea6ecb3e5bcab9ccda27fee55522942aff78c0303d8473e2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs point to various domains, likely serving as lures to redirect users to potentially harmful content.

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://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/4/130436313/130436313.html#importance+of+diagnostic+test+in+education+pdf PDF link annotation
    • http://angellashandbeauty.com/uploads/1/3/0/4/130483667/5469800.pdfIn PDF document text
    • http://led-chicago.com/uploads/1/3/1/4/131437583/6007726.pdfIn PDF document text
    • http://artcrafttheatre.com/uploads/1/3/1/4/131483090/bexaf-xikagulixumega-vixakapewota.pdfIn PDF document text
    • http://amarcuragr.com/uploads/1/3/0/2/130272081/7e3c1f601.pdfIn PDF document text
    • http://mokenarealestatelawyer.com/uploads/1/3/1/4/131437544/a6a25b95268.pdfIn PDF document text
    • http://nnn-investing.com/uploads/1/3/0/5/130541000/1934069.pdfIn PDF document text
    • http://conversationcompass.com/uploads/1/3/1/3/131379277/2e18096f6bcf508.pdfIn PDF document text
    • http://mccarthyspubfethard.com/uploads/1/3/1/3/131378950/efa7c0c74e.pdfIn PDF document text
    • http://muneforconstructionengllc.com/uploads/1/3/0/3/130313253/6702f376.pdfIn PDF document text
    • http://satromforhouse.com/uploads/1/3/1/4/131410479/tutekesisole.pdfIn PDF document text
    • http://getcbdmerchantaccount.com/uploads/1/3/0/7/130775997/gidudu-sipalukun-bodewage.pdfIn PDF document text
    • http://thecolonialtheater.org/uploads/1/3/0/5/130551445/2b6b6146.pdfIn PDF document text
    • http://servicedoffice.net/uploads/1/3/1/4/131406879/zilirikevazuvo.pdfIn PDF document text
    • http://anniestexasmusings.com/uploads/1/3/1/0/131070125/zafomufinoxezogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7573 7328 bytes
SHA-256: ab7ded30b49f9a4b98ea71dc67432ceaf3a4a4cdc0ac23f97933a00842db1ff6
font_01_sfnt_off00009253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9253 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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