Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f05242e2879fb06…

MALICIOUS

PDF

35.5 KB Created: 2020-03-29 09:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2d19acfdd998e1e00dd31535e4371d74 SHA-1: 5207fa816d629cc003102d57b7a65c91b4779c1f SHA-256: 7f05242e2879fb0682ed06fb14f6f63da6d47be43e22376cadf66e606137eea8
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm or SEO poisoning attempt to direct users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct users to download password-protected archives, a common tactic to bypass security scanners. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a phishing or malware distribution scheme.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://sta-66-99-58-206.ladse.org/uploads/1/3/0/8/130813427/130813427.html#ruta+de+mejora+escolar+sep+2014
    • http://welovenathanbrightbill.com/uploads/1/3/0/6/130604226/9335939.pdf
    • http://polozoffdesign.com/uploads/1/3/1/3/131381761/zunopo_momaxuladud.pdf
    • http://webmail.crushthemarket.com/uploads/1/3/0/5/130588225/631676.pdf
    • http://cajunhouse.com/uploads/1/3/0/7/130738936/0c92ece0a4d4e.pdf
    • http://boxclothingco.com/uploads/1/3/0/6/130639453/5e70eb13abc0314.pdf
    • http://goodshouts.com/uploads/1/3/0/6/130604226/c874c.pdf
    • http://arenju.com/uploads/1/3/0/2/130272575/kebilabowupe-fugagir-lekojazudu-kedomakedeg.pdf
    • http://r3healthandfitness.com/uploads/1/3/0/6/130621880/8642338.pdf
    • http://wheelchairwanderer2010.com/uploads/1/3/0/2/130291585/gepewujibipezubiluz.pdf
    • http://tsaheal.com/uploads/1/3/0/7/130739022/nunebotogeg.pdf
    • http://repairbilldefense.com/uploads/1/3/0/6/130621000/8279954.pdf
    • http://homesforsale-byowner.com/uploads/1/3/0/5/130539260/wemibika_xepegala_xivotetutilin_kijilitibon.pdf
    • http://74-123-76-51.mgwnet.com/uploads/1/3/0/5/130588693/5158463.pdf
    • http://jacquelinejanas.ca/uploads/1/3/0/3/130313091/78749.pdf
    • http://buckhillcoffee.com/uploads/1/3/1/0/131070394/5913323.pdf
    • http://www.rhode-island-psychotherapy.com/uploads/1/3/0/5/130588590/funowusenudurol_mupuje_vofuwaxuxokevo_mobigibus.pdf
    • http://glebeaux.com/uploads/1/3/0/2/130272396/gapegoxewinujo_sufini.pdf
    • http://newbraunfelsmasonry.com/uploads/1/3/0/7/130775639/09cb81.pdf
    • http://myprintpad.com/uploads/1/3/0/5/130588923/jegedosute_nijizizatijuwo_sejurinusi_mokunud.pdf
    • http://duanebombard.com/uploads/1/3/0/7/130740169/jogojedibepa-fakogivoju.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_off00006211.bin
81a5ca2ba1eb4c76da708d4337deb9f6b619386ac5e17e2329a8ef4ed1f6caa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 7856 bytes

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