Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b69a9e6aa451679…

MALICIOUS

PDF

37.5 KB Created: 2020-06-06 18:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 330c64e5e1a1e7d260c97a995ee2cfb2 SHA-1: 567a354a871774cc0465d2eb93fe2f3a5abf6b55 SHA-256: 2b69a9e6aa451679a86c40319a3f023633ed7c0d21e015c0f897dda5df602983
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to PDF files on various domains. This suggests a link farm or a distribution mechanism for further malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine specific payload delivery or execution methods.

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://autodiscover.storgebhs.com/uploads/1/3/0/4/130476778/130476778.html#babasaheb+purandare+raja+shivchatrap
    • http://webdisk.usualumnibookstore.com/uploads/1/3/0/6/130605143/2854895.pdf
    • http://bangbarvt.com/uploads/1/3/0/6/130620893/99d43f8c09aa2f3.pdf
    • http://caramichellevideography.com/uploads/1/3/0/5/130588550/9172242.pdf
    • http://merraephotography.com/uploads/1/3/1/8/131856492/foletunibotilizidir.pdf
    • http://ceid.co/uploads/1/3/0/2/130288510/sosefo.pdf
    • http://mail.sdhmongchurch.com/uploads/1/3/0/7/130738710/22541aba237.pdf
    • http://hostmaster.spokentocht.be/uploads/1/3/0/5/130589214/ef98948b96f0ad6.pdf
    • http://wholesalegiftsbaskets.com/uploads/1/3/0/6/130605280/2316055.pdf
    • http://britishgothictarot.us/uploads/1/3/1/4/131407165/219ce9.pdf
    • http://2oi.undesirable.us/uploads/1/3/0/6/130603779/9979542.pdf
    • http://davidbarg.com/uploads/1/3/0/6/130639374/1dd93c7c.pdf
    • http://mx.heatherglenhighlanddance.com/uploads/1/3/0/5/130538902/vowajaloti-bozijariwikeke-xafiparasok.pdf
    • http://feelsick.net/uploads/1/3/1/8/131856034/tifivizelata.pdf
    • http://autodiscover.storgebhs.com/uploads/1/3/0/4/130476778/terms.html
    • http://autodiscover.storgebhs.com/uploads/1/3/0/4/130476778/dmca.html
    • http://autodiscover.storgebhs.com/uploads/1/3/0/4/130476778/policy.html
    • https://xunovubeva.files.wordpress.com/2020/06/bupifogudejiwawokexij.pdf
    • https://wesobitid.files.wordpress.com/2020/06/50650540140.pdf
    • https://tipubek.files.wordpress.com/2020/06/zudaredolepofojuta.pdf
    • https://zepolibegam.files.wordpress.com/2020/06/80713055369.pdf
    • https://zexekiko.files.wordpress.com/2020/06/walaziserip.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_off00006767.bin
fffbd51be77e1df4ad245e099a57ae4082fe2eb39f33911382be22c90d4d5a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 10072 bytes

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