Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a60a10524c90973…

MALICIOUS

PDF

68.5 KB Created: 2021-03-25 01:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 21e6e789ef0b78019b5193d6283d002d SHA-1: 81544384dc7c6f71ad5d10fe4085df905387f33b SHA-256: 9a60a10524c90973f2c25494ca5554c6ab0bb32fb063bc14bc41e5a8b24fe18e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

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.
  • 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://gimoguvi.ru/wix?keyword=thanksgiving+cartesian+art+answer PDF link annotation
    • https://cdn.sqhk.co/puvegipuros/jh2jiD6/68113367281.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/fjBggTs/xedavonigevarulubasimevu.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/ijjj5PR/xavoferuxenizodusizupo.pdfIn PDF document text
    • https://cdn.sqhk.co/mamozinuba/cjdHvhj/general_tso_chicken_calories_no_rice.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/BB7Uhdk/watch_me_whip_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/foggWjd/84864469663.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/iPharKA/40255227298.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/bqjf9XO/korean_rice_cake_recipe_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_601a73f0be8f7.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/djejeaI/cross-_linking_polymer_temperature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_603114f3adbd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_ee70740f7c174867b3805ff8ff2602e5.pdf?index=trueIn PDF document text
    • http://kupaxomuwekag.epizy.com/67748122100.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/kukiximubemobajex.pdfIn PDF document text
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_ee3cbafc1db643fd95b198a2f10e39a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/forklift_training_school_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/who_is_the_goddess_of_darkness.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/javogixivaropad.pdfIn PDF document text
    • http://mokimonanogi.rf.gd/73287506849.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/child_body_outline_drawing_free.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_off0000d034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD034 5192 bytes
SHA-256: 035cbe6ce434ab504d807eebd7cc4cf7bc556150adcdaf71038db0927e13a082
font_01_sfnt_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 10196 bytes
SHA-256: 95dcd9f0f1ce007cf72599b8c1d484a46ba49da69c33670d2a65638561ba0ba3

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