Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec913e33e1986d7…

MALICIOUS

PDF

39.0 KB Created: 2020-04-02 09:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e50aa5987c098276180681c410a654a2 SHA-1: ce1b7ad1baf52880b076764de98e7366acc79640 SHA-256: aec913e33e1986d780c9c7bd476e4387b94c74aaa9a336c6a04afd3e49950a32
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named PDF files hosted on various domains. The document body, though partially corrupted, contains a lure related to fixing 'error code 12 sims 3' and includes a primary URL. This suggests a link farm or SEO poisoning tactic designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious.

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://chiangmaifruitcarving.com/uploads/1/3/0/4/130476076/130476076.html#how+to+fix+error+code+12+sims+3
    • http://snapmediastudio.com/uploads/1/3/0/4/130476611/4935740.pdf
    • http://cleanersliverpool.co.uk/uploads/1/3/0/7/130775529/xotonuz.pdf
    • http://restorationridesllc.com/uploads/1/3/0/6/130604775/zinarajuwa.pdf
    • http://highmoda.shop/uploads/1/3/0/7/130775694/wevivazagetituvi.pdf
    • http://gcgg.me/uploads/1/3/0/2/130272516/joxuwitewudo.pdf
    • http://aaronwilsonconstruction.com/uploads/1/3/0/5/130539923/49b71.pdf
    • http://yunisquare.com/uploads/1/3/0/7/130775760/6422732.pdf
    • http://bluejackrentalsllc.com/uploads/1/3/0/5/130543168/8874053.pdf
    • http://lunalog.net/uploads/1/3/0/6/130605314/533593.pdf
    • http://theupswingers.com/uploads/1/3/0/3/130379216/45af6.pdf
    • http://bardswine.com/uploads/1/3/0/6/130603828/sovun.pdf
    • http://chipperhairbeauty.com/uploads/1/3/0/4/130483552/4492404.pdf
    • http://acmhm.net/uploads/1/3/0/5/130551882/ab9a9e1.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/1/4/131438814/lipom.pdf
    • http://aweddingfavor.com/uploads/1/3/0/5/130589161/8049329.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_off00006ef7.bin
8f2b5e5fba5f9817e02108bef1e17f45d6b1cbfa0ff7133cd3327ba48de360c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF7 8276 bytes

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