Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb67e501810d2baf…

MALICIOUS

PDF

40.1 KB Created: 2020-03-23 09:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c5206bbd892b9be892cf894193f42cb8 SHA-1: 9171489217d03fe4c5096089bad0c8c73add115e SHA-256: fb67e501810d2baf9d3efae73bdde78e1b8f1b6e8ba5b2db031b2fd4337fcfd0
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The document body, though partially corrupted, contains text related to geometric transformations and mentions the wkhtmltopdf generator, suggesting it might be part of an SEO spam campaign or a link farm designed to distribute malicious content or manipulate search engine rankings. The ML classifier also strongly indicated maliciousness.

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://vancouverislandpremiumhardcandy.com/uploads/1/3/0/5/130543600/130543600.html#transformaciones+geometricas+rotacion+reflexion+y+traslacion
    • http://326mountainroad.com/uploads/1/3/0/3/130379347/276e86.pdf
    • http://babyphotons.com/uploads/1/3/0/6/130620536/luwagorovopas.pdf
    • http://supertrampsale.com/uploads/1/3/0/8/130874109/lekiwametodijimogu.pdf
    • http://pxrministries.org/uploads/1/3/0/6/130604710/mavur-gizagesaliwom-bewer.pdf
    • http://barbaraweiderhouse.ca/uploads/1/3/0/3/130379226/720197.pdf
    • http://calcoastbuilders.net/uploads/1/3/0/4/130483539/9561568.pdf
    • http://bradandmaria.com/uploads/1/3/0/6/130621142/7997553.pdf
    • http://remtriclub.com/uploads/1/3/0/6/130604319/jedaxe-duxosexiwiv-sapoj.pdf
    • http://www.pwrpitching.com/uploads/1/3/0/3/130323126/zesopiwiled.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/8/130874378/e6143635d9f13d.pdf
    • http://particlemountain.com/uploads/1/3/0/7/130738850/rodoxases_gavoru_kekuzuvov_sizilenokabumo.pdf
    • http://greshamheadshots.com/uploads/1/3/1/1/131163632/lutisapapajogotebeku.pdf
    • http://icedoutwatchesllc.com/uploads/1/3/0/4/130436339/runuwa.pdf
    • http://blingbitz.net/uploads/1/3/0/2/130271201/2437557.pdf
    • http://favefoto.com/uploads/1/3/0/5/130551264/541071.pdf
    • http://bootstrappinbettys.com/uploads/1/3/0/7/130776661/3f0d3e5426c3d4.pdf
    • http://challengingshakespeare.com/uploads/1/3/0/3/130313564/gasutelopigaxem_simugenuf_dogojog_sosuwoxoja.pdf
    • http://www.nextgenplacebos.com/uploads/1/3/0/8/130874150/4177583.pdf
    • http://www.theknowyourbodyproject.com/uploads/1/3/0/7/130739602/8c384abeb97a1.pdf
    • http://mhhswsummerreadingblog.com/uploads/1/3/0/7/130738758/lozaf-ruwisevezulufe-majawijuju-wofidovalon.pdf
    • http://mediationstrafrecht.nl/uploads/1/3/0/8/130814328/8033326.pdf
    • http://grandmasbaklava.com/uploads/1/3/0/8/130814830/deluzibijorikovula.pdf
    • http://www.osfsauces.com/uploads/1/3/0/6/130639888/6510306.pdf
    • http://remtriclub.com/uploads/1/3/0/4/130491594/3b7b303e8073c8.pdf
    • http://grandmasbaklava.com/uploads/1/3/0/8/130814830/d
    • 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_off00006f97.bin
f142b917fdf72db28218e86eeb47f01f49735f3ecb81f862bf4c4103a3df3ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 9028 bytes

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