Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3681f077b1173cf…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 22:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bea8d70e609f8506c56143bbef70d249 SHA-1: 24c23b73d4761deb3eeb8a3e2220bfd76d65bb46 SHA-256: e3681f077b1173cfc64a471ef213c03272926e650b7779069298669d9b229808
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=canon+powershot+a560+lens+error+restart+camera PDF link annotation
    • https://cdn.sqhk.co/lilomovetum/f9KVgjB/lifuliperefej.pdfIn PDF document text
    • http://aromaita.space/elasticsearch_6_mapping_template7zu96.pdfIn PDF document text
    • https://vixevugipun.weebly.com/uploads/1/3/5/3/135327752/3b753c8d199781.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/1e4772a9fbfc7d.pdfIn PDF document text
    • http://libralab.digital/dazujuvijasatiboruzogikob0cei.pdfIn PDF document text
    • http://avbox.org/repizidevonagizegorzaaq.pdfIn PDF document text
    • https://rajafobumexa.weebly.com/uploads/1/3/4/1/134109296/2154231.pdfIn PDF document text
    • http://reawont.online/sogutapajomibepemopel65ci6.pdfIn PDF document text
    • https://xopozutafedas.weebly.com/uploads/1/3/1/4/131453480/fab82f.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/satulibaren/black_mart_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/english_language_arts_regents_june_2018_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/88110677506.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/78132143611.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/21743507823.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_off0000de4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4C 5588 bytes
SHA-256: 7ca0e0d1c1d784f268ba41abe32c87df1d98a93381ae3a79a1365489a8d3b13c
font_01_sfnt_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 10704 bytes
SHA-256: e1bb081f8a88cd5c8fe1075776f19f689be89e779c02ce51b7e4a9ab2f9130dd