Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4af6396b44510f…

MALICIOUS

PDF

42.0 KB Created: 2020-04-04 06:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e7382f9e6d973c841b1c164e8a3f71fd SHA-1: ba89cfd32683f845623b5e1d4646ab8a863730ca SHA-256: cf4af6396b44510f8b049d78e5e76fecac24ab51208ffab24c8de75c2989400b
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM'. The document body, though partially corrupted, contains a URL that is also present in the list of external links. This suggests the primary purpose is to redirect users to a multitude of websites, potentially for SEO spam or to host further 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://lauraisaacs.com/uploads/1/3/0/5/130589313/130589313.html#muscular+system+colouring+book
    • http://ouvre-ton-compte.com/uploads/1/3/1/1/131164308/wikeduviwot.pdf
    • http://joyceoversleads.com/uploads/1/3/0/3/130379298/xekomokuli_wazezira_pojapenixugikof.pdf
    • http://momcares.org/uploads/1/3/0/4/130436068/2731077.pdf
    • http://triosreadydentallaboratories.com/uploads/1/3/1/0/131070845/bb680784238.pdf
    • http://empirerealestateinvestment.com/uploads/1/3/0/3/130313316/kakonovidipef-rulezedugozef.pdf
    • http://bigdozerfun.com/uploads/1/3/1/4/131453993/fajebidoweg_xowupumuxam_lufaxi.pdf
    • http://elotech.org/uploads/1/3/0/2/130274338/bf246f.pdf
    • http://hillsboropestcontrol.net/uploads/1/3/0/2/130289583/9ee6f0.pdf
    • http://webmail.delmarvagoldens.com/uploads/1/3/0/4/130436122/sizixunid.pdf
    • http://kmgfarms.com/uploads/1/3/0/6/130639183/fapiveduxa-xuratatud-wowazupisuki-bolubefujak.pdf
    • http://calligraphy-corner.com/uploads/1/3/0/5/130539338/6017869.pdf
    • http://dmedansky.com/uploads/1/3/1/3/131379015/7e3e99e3.pdf
    • http://ezlawz.com/uploads/1/3/0/5/130540437/lijaberuxajikezajuz.pdf
    • http://malefranch.com/uploads/1/3/0/6/130604332/1609774.pdf
    • http://pnba-artists.com/uploads/1/3/1/1/131163507/nabukupes-zulusebane.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006779.bin
a09791986d5aba782efdbea67e2690ef119483e21f616587bac52b172328efac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 7684 bytes
font_01_sfnt_off00008571.bin
45c39c4315a5d00962143d4102937301eb2649728d6de39b959633cfc30365c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 16144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.