Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6860e9a5fb687be…

MALICIOUS

PDF

77.7 KB Created: 2021-02-26 13:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ad60daaa2541ea5369fa9f0a1f376685 SHA-1: a8df0fcd585f17682e688b84d6e93a1740d9362d SHA-256: e6860e9a5fb687be2fdb0c08c16b7c2a9202c8698605a3e4f8854957c13be974
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, likely for phishing or malware distribution. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. ClamAV detection confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+to+change+time+on+radio+controlled+clock PDF link annotation
    • http://dimax-matrasy.ru/a_few_a_little_exercises_with_answersuvcht.pdfIn PDF document text
    • http://ipoteka.net/football_manager_2020_mobile_mod_apk_11.3.0ml4ck.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409395/normal_5fdece55b1e4d.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/gHlgjgd/tavuzude.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/gieWign/ball_maze_rotate_3d_labyrinth_puzzle.pdfIn PDF document text
    • http://remontvorot24.com/kitchenaid_artisan_5ksm175psb_stand_mixer_-_whitedvex8.pdfIn PDF document text
    • https://dusivasawomila.weebly.com/uploads/1/3/4/6/134660852/zonetajizit-fedadunovun-jezifuzavubaron.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/xogasid5l3.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/hgCAggB/exodus_cryptocurrency_wallet_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_602117d08d4a6.pdfIn PDF document text
    • http://hookup750.website/gomuwetobukiszsxn.pdfIn PDF document text
    • http://iwhite.space/cuantos_metros_tiene_un_kilo_de_alambre_galvanizado_calibre_12fszst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_5fdb76803caf7.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/viverukixetigodumug.pdfIn PDF document text
    • https://cdn.sqhk.co/titolegun/SLFTYaL/21212426598.pdfIn PDF document text
    • http://damvglaz0.xyz/bus_ticket_editable_format614lz.pdfIn PDF document text
    • https://sixebujexe.weebly.com/uploads/1/3/0/7/130740217/5fb74.pdfIn PDF document text
    • http://cmbespaceclient.xyz/56176719180vp38a.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/jevedijadiki/aankhon_hi_aankhon_mein_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/challa_india_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/definicion_de_diagnostico_segun_autores.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_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 5292 bytes
SHA-256: 01d5bde27422f2aafb747325a187816fca65c16c9ebbb89fc63ef141c48d17c2
font_01_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 11088 bytes
SHA-256: d152bd06389db38c0cf10d26442d87713856b3513abc05a67ddbdfb6fc674ab5

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