Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c46661d0646e396…

MALICIOUS

PDF

37.1 KB Created: 2020-05-14 02:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b3167d03f6e7860fe12aa565e7f12640 SHA-1: c11b6fc5c663a7637c2bd7362f82aa22e59a12b3 SHA-256: 3c46661d0646e396b89851865026505598e386f1c683844f661c5f32f3a404f8
70 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files, characteristic of a link farm designed to improve search engine rankings. One of the embedded URLs, http://phrasebridge.com/uploads/1/3/0/6/130621755/130621755.html#autodwg+pdf+to+dwg+converter+serial+number, suggests a lure for software downloads. The presence of a visual download button further supports this phishing or scam-related attack pattern. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://phrasebridge.com/uploads/1/3/0/6/130621755/130621755.html#autodwg+pdf+to+dwg+converter+serial+number
    • http://kodiaksyle.com/uploads/1/3/1/6/131607331/jipidivak.pdf
    • http://villaourlady.com/uploads/1/3/1/3/131398269/2473501.pdf
    • http://mykleaners.net/uploads/1/3/0/4/130476908/4717477.pdf
    • http://lhd-ent-managergmail.com/uploads/1/3/0/6/130620453/robabaxok_lebubuv.pdf
    • http://bonaguahhi.com/uploads/1/3/1/4/131483034/lumekepufeden.pdf
    • http://oxnardpoolcleaning.com/uploads/1/3/1/4/131411431/xameborosemedisake.pdf
    • http://bedonetmarmaille.com/uploads/1/3/1/3/131398545/6616128.pdf
    • http://angel444energy.com/uploads/1/3/0/5/130539165/7b702.pdf
    • http://bestlifenashville.com/uploads/1/3/0/9/130969855/somulud.pdf
    • http://smecoach.eu/uploads/1/3/0/7/130738721/rarelidinufom.pdf
    • http://shessoextra.com/uploads/1/3/0/8/130874610/4825797.pdf
    • http://anniebeg.com/uploads/1/3/1/3/131381553/tebesep-xosurego-geloditomogaras-xumekamuger.pdf
    • http://gracewhisenand.com/uploads/1/3/0/5/130542829/farokurosogit_goxagaban.pdf
    • http://sorabokki.com/uploads/1/3/0/7/130775866/5351506.pdf
    • http://optimise-me.com/uploads/1/3/0/5/130589410/miviku.pdf
    • http://numeracyshed.com/uploads/1/3/0/5/130590019/fidar_rufuzoxazumiza_gefaxovafikal_viguveduzad.pdf
    • http://mitmultiservice.com/uploads/1/3/0/7/130739140/pumibubojoxuja.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_off000062b1.bin
49232f547045075bbf499120ad88980476ce6c290332a8242abc306145e20271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 11108 bytes

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