Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cc12c9fb7f9c76…

MALICIOUS

PDF

42.7 KB Created: 2020-03-26 13:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 870e04c6f39205126481312d7de8de36 SHA-1: 882f6eaf140f719297c4e1552501a87020ad4a4e SHA-256: 67cc12c9fb7f9c76652f2df84ffb9426c61a1f8b8c9f9656d8c8bf4f91383394
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external URLs suggests a potential for further malicious content delivery or redirection, possibly initiated by embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://dicemailbags.com/uploads/1/3/0/6/130639679/130639679.html#align+trex+450+pro+setup
    • http://www.coshconstruction.com/uploads/1/3/0/7/130775294/silanixorefob.pdf
    • http://www.clarkeperfume.com/uploads/1/3/0/7/130739836/b209c0a7f4fb.pdf
    • http://empoweringwomenonline.org/uploads/1/3/0/8/130813558/filofuvuba.pdf
    • http://nicol.live/uploads/1/3/0/5/130551401/e3b8c.pdf
    • http://relaxedskincarefacefullbodyservices.com/uploads/1/3/0/7/130775911/pavuzilulenake.pdf
    • http://heartbeatboxingclub.com/uploads/1/3/0/6/130604556/6f4162d508a.pdf
    • http://cfoashland.com/uploads/1/3/0/5/130550982/xukobu_vunixujixalof.pdf
    • http://uhlenhof.eu/uploads/1/3/0/4/130489706/vatikasulepaxesoni.pdf
    • http://brokenarrowphotobooths.com/uploads/1/3/0/3/130313513/7529600.pdf
    • http://ottawakinesiology.com/uploads/1/3/0/3/130323295/4295187.pdf
    • http://lakeholcombe.net/uploads/1/3/0/8/130874413/nusizonejoga.pdf
    • http://mta-sts.mail.parkerproductions.net/uploads/1/3/0/2/130272501/3961102.pdf
    • http://www.cohrslaw.com/uploads/1/3/0/5/130590351/jojojeriwoke.pdf
    • http://www.mkefacepaint.com/uploads/1/3/0/6/130640219/716522923a.pdf
    • http://caymanlivetv.com/uploads/1/3/0/7/130775806/3446003.pdf
    • http://www.striveroot.com/uploads/1/3/0/6/130605073/walatugotevo.pdf
    • http://www.opp4happ.com/uploads/1/3/0/4/130475939/3429298.pdf
    • http://alevoaltaevolucionempresarial.com/uploads/1/3/0/5/130550812/rivawixajaro_supegareb.pdf
    • http://nw3.me/uploads/1/3/0/8/130814143/903175.pdf
    • http://www.tattoohades.com/uploads/1/3/0/5/130588740/gazatirelaga.pdf
    • http://villagenutritionri.com/uploads/1/3/0/4/130488780/7661668.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_off00007e6f.bin
2c6c35c1a36324f8141bb6ead814edc9fe262748661d3bb625ec3b3316142398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6F 8028 bytes

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