Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e662377ade6f6f…

MALICIOUS

PDF

91.5 KB Created: 2021-04-10 07:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 91d7d214591d09c787470dba0de7470c SHA-1: 90f7471e46ea0dc998a9de69cd9ccb157cf5abec SHA-256: 11e662377ade6f6f1522f7d4085cbed01d4f31f7162b7f3210addf56202a5c36
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=define+archetypal+criticism PDF link annotation
    • http://xivazokib.medianewsonline.com/pearson_realize_algebra_2_textbook.pdfIn PDF document text
    • https://simazilojimi.weebly.com/uploads/1/3/5/3/135345327/nilajewega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489983/normal_5ff115b64ae20.pdfIn PDF document text
    • http://vovality.club/velopevaterumorcjn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_602f75b0eddef.pdfIn PDF document text
    • http://shlifovka-pol.website/rozorudonezuwefivagozs5vsh.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/16159215045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5fefd429777d4.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://study-english-05.site/how_many_calories_are_in_a_strawberry_frosted_donutikysx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_6036dcbfc51fd.pdfIn PDF document text
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/ruwoxegidakomawad.pdfIn PDF document text
    • http://zunanifuxomo.iblogger.org/geometrical_optics_questions.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/rojalexipokadaz/furizujisaxiwij.pdfIn PDF document text
    • http://nivewuwasidurus.epizy.com/barron_s_600_essential_words_for_the_toeic_4th_edition.pdfIn PDF document text
    • http://ganuxujerotapu.epizy.com/after_effect_cs6_full_free.pdfIn PDF document text
    • http://loxosufodu.epizy.com/zimibebixovinen.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/86416982498.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/17072602090.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/how_to_clean_the_wolf_steam_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/25371947580.pdfIn PDF document text
    • http://nukuluduresuju.rf.gd/lijeguzabovowubiposobat.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_off00012973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12973 5356 bytes
SHA-256: f7111d9754336782259a0a6aa5abfbf9d52b7fecf4bf3ad51fffbafa14c9e095
font_01_sfnt_off00013b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B96 10904 bytes
SHA-256: 928526e2ed10af411e7b59fb3ead6b0f157f5023f9ae7abb7afb30d72ab8b6a8

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