Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8b47745e1a0d70…

MALICIOUS

PDF

94.2 KB Created: 2021-03-21 22:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 416ffdabb80d9fe6e3bf737dc59352d5 SHA-1: 656563ae1eb97085a890638c612eec28bb869487 SHA-256: 1f8b47745e1a0d706b2341d940514a4ee65555f0e680a1fcbd565a917b4339ae
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to a link farm hosted on disposable domains, a common tactic for SEO manipulation or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=science+olympiad+protein+modeling PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381344/normal_601e3a90c97ed.pdfIn PDF document text
    • http://nesobaka9.xyz/is_breath_of_the_wild_the_best_zelda_game4bare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372960/normal_5fe5087c503c7.pdfIn PDF document text
    • http://lukofaduxaxa.22web.org/9728209017.pdfIn PDF document text
    • http://detonic-italia.website/tomopivasupukuzotetavavik6ji8.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/ytgiidw/pizap_free_online_photo_editor_collage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_604e13c24c20a.pdfIn PDF document text
    • http://custits.space/xerinurojjdg.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/Zhdjfhi/26028604599.pdfIn PDF document text
    • http://study-english-05.site/6602826071axvvb.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xijuroluzuka.epizy.com/17488214213.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_5f6fe802b544497cbd170a9561d1c152.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e81e4b9-974b-421a-a0d5-5364cd6dfa60/cateye_micro_wireless_setup_cc-mc100w.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_a17220b27cd344f8a688eab75fc961e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf8d9be-80c3-4de4-88a3-67f828351186/cloud_9_cravity_lyrics_terjemahan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6921e10-55a0-4a15-bb39-d80d8220db2b/how_do_you_achieve_your_goals_and_objectives_answer.pdfIn PDF document text
    • http://weforonezanofo.epizy.com/rozomozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51d5095-e0bb-4a66-9621-9ecd7b4d9e5c/the_maze_runner_summary_chapter_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a16c8a9-c60d-4709-a9b7-98bdb36807ef/how_to_use_xfinity_xr15_remote.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_off00013207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13207 5420 bytes
SHA-256: 232f39217e80faa4943bb263a0bdcd0fe30978e32a5d10b41b22dc6d3df45930
font_01_sfnt_off00014467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14467 11052 bytes
SHA-256: 44cec09506f3659938513c1c7c29069ef84da4797128201c9070d74190a15be6

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