Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6f2b9782201acb…

MALICIOUS

PDF

35.6 KB Created: 2020-03-22 07:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6241b31a7f9ba81f9f9e4499ce070a57 SHA-1: 3075bb2e59316b6dfdf1a2dad78f2e75586ef290 SHA-256: 7f6f2b9782201acb8eb88cec098935b4c2fae77253bfe8a55b6ff08dfa0dc07b
96 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and contains a large number of external links, many pointing to other PDF files. The document body text, while appearing to be a vehicle manual, is likely a lure to disguise the malicious intent of hosting a link farm. No scripts were extracted, but the presence of numerous external links suggests a potential for hosting further malicious content or for SEO manipulation tactics.

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://readytooclean.org/uploads/1/3/0/7/130740206/130740206.html#2014+jeep+wrangler+sahara+owners+manual
    • http://gelinkalbigelinlik.com/uploads/1/3/0/5/130588540/3126afbcd3f4383.pdf
    • http://socialstarllc.com/uploads/1/3/0/9/130969746/669809.pdf
    • http://shirazvisinko.com/uploads/1/3/0/7/130740444/7077928.pdf
    • http://anthropoceneexploration.com/uploads/1/3/0/5/130539344/39cf92ed.pdf
    • http://thehappywitch.com/uploads/1/3/0/5/130544230/07fe4.pdf
    • http://michaudsblog.com/uploads/1/3/0/4/130476940/tanoge_mukigalaf.pdf
    • http://everydogisaworkofart.com/uploads/1/3/0/9/130969991/8fd9a7326d471.pdf
    • http://andrewwermouth.com/uploads/1/3/0/7/130739618/2d43f9.pdf
    • http://ponderosatree.com/uploads/1/3/0/3/130313433/tegaxa_fakesokulom_dajesapal_zibir.pdf
    • http://waxitbymell.com/uploads/1/3/0/3/130323401/nozevija.pdf
    • http://mta-sts.mail.randrpressurewashingllc.com/uploads/1/3/0/2/130272985/deb8182.pdf
    • http://fatallyfierce.com/uploads/1/3/0/6/130605166/216369a484bab.pdf
    • http://itsmyland.net/uploads/1/3/0/4/130483477/1461078.pdf
    • http://copperbeechjewelry.com/uploads/1/3/0/6/130603889/fezirega.pdf
    • http://shaolinwahnam-zenbusiness.com/uploads/1/3/0/5/130550688/7015365.pdf
    • http://4everything4you.com/uploads/1/3/0/4/130476273/wizelemelege.pdf
    • http://webmail.littlecreekfarmllc.com/uploads/1/3/0/8/130813025/ruwoxaw.pdf
    • http://oceanassassin.com/uploads/1/3/0/8/130874218/5961751.pdf
    • http://www.gladandginger.com/uploads/1/3/0/7/130738507/91708685e.pdf
    • http://tshirtplanetdesign.com/uploads/1/3/0/3/130313411/wasokanuvazene.pdf
    • http://itprojectmanager.info/uploads/1/3/0/7/130776850/9897728.pdf
    • http://mpcaa.net/uploads/1/3/0/4/130491488/7479433.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_off000062ae.bin
9fbd77c3e5ef20167c45779c977eaa306d01910eaab009d55eb91468638e0aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AE 7696 bytes

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