Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc00c09ea280232e…

MALICIOUS

PDF

73.7 KB Created: 2021-06-07 17:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 054108d18115373337cba53628b06188 SHA-1: a2317b870f7df9ff609dec67f080900c40b68620 SHA-256: cc00c09ea280232e3ab2986b50b410c3ebfaecee7f4e59e17f77a853b93802e0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous external links, with a significant portion pointing to disposable hosting and acting as a link farm, suggesting an attempt to direct users to malicious websites. The embedded URLs and the nature of the PDF heuristics strongly suggest this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://infrive.ru/pbw?utm_term=how+to+value+a+piece+of+jewelry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454303/normal_60476fd2366c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408866/normal_5fe437f653a9e.pdfIn PDF document text
    • https://mazokozofifux.weebly.com/uploads/1/3/4/3/134305155/vexeje.pdfIn PDF document text
    • https://tazavuzinun.weebly.com/uploads/1/3/4/6/134600399/9378823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_605cf45098a04.pdfIn PDF document text
    • https://luretazolikaxu.weebly.com/uploads/1/3/4/5/134587875/bd8ecba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_605d6eabcedf2.pdfIn PDF document text
    • https://jedirixaz.weebly.com/uploads/1/3/4/8/134875163/23238.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/misom-zegivusedetem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483587/normal_60082bc5ab677.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzojadek.pbworks.com/w/file/fetch/144722643/transfer_whatsapp_data_from_android_to_iphone_reddit.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144507138/how_covid_19_affects_students_learning.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144450282/age_of_empires_2_definitive_edition_cheats_car.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144769992/nightmare_fredbears_eye_color.pdfIn PDF document text
    • http://zilebunod.pbworks.com/w/file/fetch/144424926/baby_shark_twerk_remix_free_download.pdfIn PDF document text
    • http://nozobitativi.pbworks.com/f/causative_exercises_with_answers.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144458418/1876954086.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/w/file/fetch/144735447/11378378508.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144419778/best_server_for_ark_ps4.pdfIn PDF document text
    • http://vafakana.pbworks.com/w/file/fetch/144674541/70562065169.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/w/file/fetch/144790878/14213726995.pdfIn PDF document text
    • http://gonikob.pbworks.com/f/unblocked_games_67_just_fall.pdfIn PDF document text
    • http://sixuditar.pbworks.com/w/file/fetch/144649278/10171042494.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_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 5124 bytes
SHA-256: 6c2755024c7cfbab6fc817662d45c38aa83be6cbc82cfb8a5fbf932de12af185
font_01_sfnt_off0000f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 11312 bytes
SHA-256: aa63c32c5302b541217c5559d5dfc08b0515e39fb9003fcf5a1fa24bdd0aafa1

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