Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2e66daaa954264…

MALICIOUS

PDF

108.4 KB Created: 2021-03-05 06:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 47ee2020f85a78caa7bae05bddb42876 SHA-1: 200ff11701971358e4e0271e6715b1d1fc947369 SHA-256: 2d2e66daaa954264b152040f2c0d462405993f3f0709879d40e38aa64a02f803
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various domains, many of which are hosted on disposable or potentially malicious platforms. The document body is heavily obfuscated, but the presence of a large number of external links suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/123?utm_term=proceso+del+coronavirus+en+el+cuerpo+humano PDF link annotation
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/vugapigivisetol-sasumegovavofa.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/ragegotatase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428052/normal_6000b2a4d2038.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/iipIhjc/moviestarplanet_2_game_online.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/c7f4b4.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/4b6fb64f0836a.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/ijhhgcY/factory_inc_garage.pdfIn PDF document text
    • https://watinamubil.weebly.com/uploads/1/3/0/8/130813586/7471535.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/gusawedipil-dabib-bolumeruditubir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_6039c90c99237.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/32651136988.pdfIn PDF document text
    • https://tikuvafijosil.weebly.com/uploads/1/3/4/6/134685963/4601058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_602f764c054a3.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/id81mhb/pupefumikotona.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/aeschylus_oresteia_themes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fobupojowojon/54661997987.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/jinaregadepipe.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/what_temperature_do_you_bake_a_ham_in_the_oven.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14739 5208 bytes
SHA-256: 28831bd9a540c3b50c5451cbaac74f76abe7bbbe2ba6109235b640c00a8b94ca
font_01_sfnt_off00015919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15919 5176 bytes
SHA-256: 661d0fb7f7e5b4bb1acda1e76950aa3d90acde8e86de9a5360d54ed59a9d08de
font_02_sfnt_off00016a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A74 12628 bytes
SHA-256: 3ade5788c361d5eccadb6321bfb3a8acae44132aaf9601a8f0137c0d750d2801
font_03_sfnt_off000193cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193CB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34