Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa69499e5eda72ee…

MALICIOUS

PDF

133.5 KB Created: 2020-03-26 10:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1c47be1ba42a5ed720a25559ec4569ff SHA-1: 7d36321e6dd36fb21ac5f12f4aff9c92cff99321 SHA-256: fa69499e5eda72ee559eefe621e12814b7720fcd8d8b4f06704404c28ed24c49
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier with high confidence. It contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to distribute malicious content or phishing pages. The document body contains text related to 'Tratamiento para el trastorno antisocial de la personalidad pdf' and metadata indicating it was generated by wkhtmltopdf, which can be used to create documents that appear legitimate but host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://slbconsultingservices.com/uploads/1/3/0/3/130313274/130313274.html#tratamiento+para+el+trastorno+antisocial+de+la+personalidad+pdf
    • http://njliupdate.com/uploads/1/3/0/7/130776325/xirobak_tafuzo_niziko_gudanagixod.pdf
    • http://baltictradeservice.com/uploads/1/3/0/7/130738679/zusik.pdf
    • http://breakfastwear.com/uploads/1/3/0/2/130291441/lijonujowote_govum.pdf
    • http://offtrackoncourse.org/uploads/1/3/0/8/130813518/fowufok_fikij_gizupij.pdf
    • http://www.mylesgrp.com/uploads/1/3/0/8/130874318/9686012.pdf
    • http://rc-vc.com/uploads/1/3/0/7/130740127/7514178.pdf
    • http://www.sherwoodduplex.com/uploads/1/3/0/7/130740414/bugulak-pavesu.pdf
    • http://helppalestine.com/uploads/1/3/0/5/130590126/fa9cbd.pdf
    • http://ccpropertyinvestment.com/uploads/1/3/0/7/130739369/givimirulifa-zitoxo-watujudimamo-jabiv.pdf
    • http://michiganfolkschool.org/uploads/1/3/0/6/130621844/netigalevofi-wekoleri.pdf
    • http://bloggynotion.com/uploads/1/3/0/5/130588622/kadojab.pdf
    • http://indiansoulcollective.com/uploads/1/3/0/6/130621808/tuzexomevenu_tekivajefu_mejefuriza.pdf
    • http://autodiscover.rpm.madesimplydev.com/uploads/1/3/0/7/130775346/kufivadiludafa.pdf
    • http://theatriumcafe.com/uploads/1/3/0/6/130604295/888dba70.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_off0001cfa1.bin
cb61e8af141927a92b41253b0579d51b754038ec3dfc1bb479be643164b8bc0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFA1 9496 bytes
font_01_sfnt_off0001f1e1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1E1 16036 bytes