Malicious PDF — malware analysis report

Static analysis result for SHA-256 267a1d8b2d293c77…

MALICIOUS

PDF

70.7 KB Created: 2020-03-30 05:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: da6abc68d6385733dd38e69a080f6eae SHA-1: 1383016a86ebcbd60ed378e3df0ec98a3fe64a9d SHA-256: 267a1d8b2d293c7749c88f06aad0f8fd3b9ffaf8c110aafa9ce70454f29a0b06
94 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, a technique commonly used in SEO poisoning or phishing campaigns to redirect users to malicious websites. The ML classifier strongly indicated maliciousness, and the presence of a PDF link farm heuristic further supports this. No scripts were extracted, but the document body itself contains obfuscated text and a primary URL, suggesting a lure to external malicious 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://edgelandscapeandmaintenance.com/uploads/1/3/0/4/130483761/130483761.html#curs+literatura+universala+si+comparata
    • http://galsinstitute.net/uploads/1/3/0/6/130603858/tagerasikup.pdf
    • http://alphafitathetics.com/uploads/1/3/0/4/130490053/9030638.pdf
    • http://bigfnthings.com/uploads/1/3/0/6/130604319/vekup-pikotativine-mebopenef.pdf
    • http://triadageless.com/uploads/1/3/0/7/130776629/ledusabexafekum.pdf
    • http://albatrosshomebuyers.com/uploads/1/3/0/6/130639904/6029665.pdf
    • http://prbycr.com/uploads/1/3/0/6/130622093/bukawonowugi-xanarolepel-lexetativ-zunefekibarotes.pdf
    • http://micapreneurship.com/uploads/1/3/0/7/130739164/c293a02e495e8fc.pdf
    • http://pufhookahlounge.com/uploads/1/3/0/5/130538875/lilelewanexubedimexo.pdf
    • http://shalefieldstories.org/uploads/1/3/0/7/130738572/9050559f.pdf
    • http://paxcommunications.com/uploads/1/3/1/0/131069777/203880.pdf
    • http://kshobbyvinylandsupplies.com/uploads/1/3/0/8/130814492/rerekesovovolilufe.pdf
    • http://tribecamobile.com/uploads/1/3/1/0/131071043/genasavonikuru-vokegeviles-lorikopotij-wonefedew.pdf
    • http://watergardentherapy.com/uploads/1/3/0/7/130776338/nolowowefa.pdf
    • http://bloterps.com/uploads/1/3/1/0/131070226/9230586.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_off0000dfae.bin
bf2657327f8685ee290f4b80f2a7b1403bd6e9ef08e09f6298a43db706c6b826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAE 14272 bytes

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