Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf7ef97296748f0…

MALICIOUS

PDF

44.3 KB Created: 2020-03-30 13:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3ad3b832b8efb79920da387e62922d3e SHA-1: 024e55441d4264bda5428d952cb2a6d5a42c5a82 SHA-256: 7bf7ef97296748f0defcad35bfdc42a55e92c631562c8e4ec77b0b753a9a0de4
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which appear to be part of a link farm designed to direct users to external websites. The document body, though heavily obfuscated, contains references to reloading supplies, suggesting a lure to attract clicks. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm, indicating a likely SEO scam or phishing attempt.

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://loskuatro20decalifornia.com/uploads/1/3/0/5/130545666/130545666.html#7mm+rem+mag+reloading+supplies
    • http://seasonalwellnessclinic.com/uploads/1/3/0/4/130478295/3628842.pdf
    • http://csmmttaiwin.com/uploads/1/3/0/6/130621082/nularawejakik.pdf
    • http://wllcreative.com/uploads/1/3/0/5/130551597/2816246.pdf
    • http://listentoher.org/uploads/1/3/1/4/131437622/jofezikefit.pdf
    • http://resonatehealthcentre.net/uploads/1/3/0/5/130588718/8ff498e7.pdf
    • http://margaritasindy.us/uploads/1/3/0/6/130604045/tudiburukegivadasom.pdf
    • http://lawn-care-services.ca/uploads/1/3/0/7/130776075/saliw.pdf
    • http://bsmart.be/uploads/1/3/0/9/130969021/damizuzeguku.pdf
    • http://bobbymayfly.com/uploads/1/3/0/4/130489367/f4a6c96b3.pdf
    • http://groomsbyjagger.com/uploads/1/3/0/6/130620195/fapafava.pdf
    • http://joinorchestra.com/uploads/1/3/0/2/130287553/8077490.pdf
    • http://theicecreamcakery.com/uploads/1/3/0/5/130551944/d2836286a0c.pdf
    • http://ompom.bike/uploads/1/3/0/7/130775715/c4a2b.pdf
    • http://hashtagbottles.com/uploads/1/3/0/2/130287845/kotizof.pdf
    • http://diamonddobermansoklahoma.com/uploads/1/3/0/3/130379231/5ea22f2.pdf
    • http://vjpaulsurrealproductions.com/uploads/1/3/0/9/130969632/dazuluf.pdf
    • http://joliveira.net/uploads/1/3/0/5/130550667/2995734.pdf
    • http://myotherapyservices.org/uploads/1/3/0/7/130739221/veniji-jisog.pdf
    • http://goldcoastlaserteethwhitening.com/uploads/1/3/0/5/130589187/5f975e5f17dc.pdf
    • http://michaellmartin.com/uploads/1/3/0/5/130590475/2792731.pdf
    • http://creativecaperture.com/uploads/1/3/0/8/130813063/4836661.pdf
    • http://adelona.com/uploads/1/3/0/7/130739328/nivijiteropipo.pdf
    • http://bazaarcafesf.shop/uploads/1/3/1/1/131164252/86f81d8f7d2d.pdf
    • http://loanmentum.com/uploads/1/3/0/3/130379504/kofogisokiwexewofepa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079cb.bin
6a26421e72776732f480304f14816e5f937043166d4c48e851fe76c18fa3846d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CB 7872 bytes
font_01_sfnt_off0000985b.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x985B 2616 bytes

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