Malicious PDF — malware analysis report

Static analysis result for SHA-256 22262ec6e7834f7b…

MALICIOUS

PDF

36.1 KB Created: 2020-04-02 21:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f25077f4e5b238ce57d07808048bb4fa SHA-1: 2925ab32b8903a8c074c6b5ce5c3f93ff5952973 SHA-256: 22262ec6e7834f7be036ee0101b5b6cdb39d1f6172cdebeb6c2461ab53565f4e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified as a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links points to a delivery or redirection mechanism rather than legitimate document 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://juicyscoopobsessed.com/uploads/1/3/0/6/130621776/130621776.html#fast+5+translations
    • http://simonelawncare.com/uploads/1/3/0/5/130539987/wenudisarinatepo.pdf
    • http://clachmorefarm.com/uploads/1/3/0/6/130620708/4d2a48342f7ee0.pdf
    • http://rollingoaksmemorialcenter.biz/uploads/1/3/0/3/130313006/24a5950b6.pdf
    • http://impecservices.com/uploads/1/3/0/8/130873740/xujugobatef_nibedudavekidaf_tapotejeb.pdf
    • http://jkb-consultancy.com/uploads/1/3/0/2/130272362/6168448.pdf
    • http://cateuthanasiaathome.com/uploads/1/3/1/4/131406861/4882946.pdf
    • http://redgumestate.com.au/uploads/1/3/0/2/130272364/wanumari_zimulakiwe.pdf
    • http://cleanonomics.com/uploads/1/3/0/8/130813362/zepojam.pdf
    • http://confecciones.net/uploads/1/3/0/6/130620407/ketobeladubifitipu.pdf
    • http://snapferncreek.com/uploads/1/3/0/3/130313141/xofatiza-retixedob-rapiga-zagalek.pdf
    • http://vigilservicesgroup.com/uploads/1/3/0/7/130740086/b6b2180e20acd.pdf
    • http://lifeforceorganicsllc.org/uploads/1/3/0/5/130539676/xakimamofozuxezajuje.pdf
    • http://thetrailyouth.com/uploads/1/3/0/6/130620632/89861ad3b.pdf
    • http://darciestevenson.com/uploads/1/3/0/4/130476503/vomojaga-somaguvun.pdf
    • http://crisat.com/uploads/1/3/0/2/130288430/pakajimavid.pdf
    • http://seambuildinggroupptyltd.com/uploads/1/3/0/3/130379634/jobaju.pdf
    • http://rainerclinicalconsultants.net/uploads/1/3/0/8/130815115/2ed436380ef8b5.pdf
    • http://organizeme.guru/uploads/1/3/1/0/131071062/3245172.pdf
    • http://vitaeviz.com/uploads/1/3/0/7/130738854/godigamam_netuloselisege.pdf
    • http://aspemag.com/uploads/1/3/0/9/130969754/besigo-dufowagezilepi.pdf
    • http://starbabysydney.com/uploads/1/3/0/6/130604948/8605083.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_off000065e5.bin
12ed5cd4ccc504385709e2f9a71f69b21a75e60f8d7ee4dfcb15b05c42bc828a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 7412 bytes

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