Malicious PDF — malware analysis report

Static analysis result for SHA-256 38078a33386f4457…

MALICIOUS

PDF

69.7 KB Created: 2021-03-03 00:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b8a437904a87cab1d3307390cdb94e35 SHA-1: dab47508f159ff6c4905569a03b04cde20e5ef8e SHA-256: 38078a33386f4457bac925c7825a2cb9ffcae2c2b36ebec8abd2c3f790eacc60
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://mezovuduw.ru/wix?keyword=perpendicular+and+parallel+lines+worksheet+grade+3 PDF link annotation
    • http://cherrypimp.online/soleus_air_70_pint_dehumidifier_warrantypsv66.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/ganasikumuzepepujena.pdfIn PDF document text
    • http://blockingscenery.com/26090354444et3e5.pdfIn PDF document text
    • http://mantenancie.com/270704870664ovne.pdfIn PDF document text
    • http://golden-charm.ru/verotub9iese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_60305c4c4c59d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/lapodopa.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/vawudedokudewokopo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/8672974497.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/acgih_formaldehyde_limits.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/whats_the_3_day_potty_training_method.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/a_brilliant_young_mind_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/vavonoras.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/pivovodopefonizajufifu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AC 5656 bytes
SHA-256: 479ae9eb77d4e7769b2432c56d92e95538d153ef7fa36cf3ba6fd1d75bd075b2
font_01_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10548 bytes
SHA-256: f68d214289d616cd6c8afe948eb4e9537911b69ec0d195ac4ee7864d44e21564