Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8229c75db8426c…

MALICIOUS

PDF

80.4 KB Created: 2021-04-17 11:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3732115991561322dec50c3e829cc651 SHA-1: 409a422e0e4cc1f50850656327f5bfbf5735ab85 SHA-256: 0e8229c75db8426cfb628b73403b0db6760aa474456d39e0f67e601a395cee4c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and link farms, which is characteristic of phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=value+of+higher+education+essay PDF link annotation
    • https://cdn.sqhk.co/zofizitene/JmjgiaW/fidowesulefisekedosowoku.pdfIn PDF document text
    • https://jokanile.weebly.com/uploads/1/3/5/9/135962808/c1e0d31f0c3e.pdfIn PDF document text
    • http://matcobzor.ru/metformin_mechanism_of_action_pcos2lm50.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/clCEey8/12252293612.pdfIn PDF document text
    • http://chestlune.online/11_plus_synonyms_and_antonyms_worksheetsp2u1l.pdfIn PDF document text
    • https://vipogonegope.weebly.com/uploads/1/3/0/9/130969266/pelosewetobafajeji.pdfIn PDF document text
    • http://ita-women.space/3098377424rz7pp.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/mixapagewuruj.pdfIn PDF document text
    • http://lalashoppen.online/34684758029tmgly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495262/normal_5fdb40df6a88d.pdfIn PDF document text
    • http://septiki-rf.website/aesthetic_clinic_business_planutl8s.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/Thhgie6/xelajazex.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/dhfNPLd/odd_eyes_saber_dragon_duel_links.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/hlhbffv/hotel_slime_clicker_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384143/normal_5fe55cd999869.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/how_to_turn_off_adt_alarm_panelzv07t.pdfIn PDF document text
    • http://douchehq.xyz/37920634480a8pik.pdfIn PDF document text
    • http://magnetfix.store/tiktok_video_download_without_appsfpai.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/cc1de.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/gipxQha/ham_cheese_sandwich_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/iapToXB/puzzle_bobble_4_download_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFE 5352 bytes
SHA-256: 701b854bc9ab5ee82eae9dada19075ab1232a579c74ef4ca143a236ad6575ecc
font_01_sfnt_off00010e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E39 10964 bytes
SHA-256: c13b6c75bbc5aa2ed28f5db637811090d5e42b3a3221e5ea3b50717a782badcb

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