Malicious PDF — malware analysis report

Static analysis result for SHA-256 427a40133163be7d…

MALICIOUS

PDF

72.2 KB Created: 2021-04-04 06:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 567779f3ea8505431cfeca0a8c007b36 SHA-1: 56836e24632d83d5d02ebfaaa7b40e0eeb72071d SHA-256: 427a40133163be7db2faa21a9da1149e30c2734615639a3ad332423c178e593b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://crophysi.ru/strik?utm_term=how+to+change+temp+on+lg+fridge PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485711/normal_6043cc4278668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_604222cf82ed1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_606197ea1935b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413719/normal_5fc8921496119.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/lunojol/nomukenaxasewubolewuj.pdfIn PDF document text
    • https://e1dd9d5d-2564-403b-b9eb-750b563e155e.filesusr.com/ugd/00b056_bb672a1a88e6434c9549e8e9988dc640.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/how_to_set_time_on_filtrete_thermostat.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_7481d5221f084ed297288ddbca15328a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujodibu/al_quran_bangla_pronunciation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/tukupotidawunexotenasi.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/37674942639.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/lonely_planet_magazine_competition.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/basic_english_grammar_book_saddleback.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/vidmate_app_all_video.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/beats_solo_hd_headphones_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/online_android_games_for_pc.pdfIn PDF document text
    • https://7fd4abad-31f8-4c52-ae8e-93d0cc7f2af2.filesusr.com/ugd/910e70_08ede143c0134cc0a7b8c0fec614dc4c.pdf?index=trueIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_0ae775e957de4ed79be25cf1107bc91d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zulezov/badminton_league_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/free_home_bookkeeping_software.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/47952286272.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 5444 bytes
SHA-256: a0317c6fa289b66c989056c668adcfcba90f828b41fc271936584b77060c6408
font_01_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 10904 bytes
SHA-256: 42416fb03b2642fb8014355218497e9b58cec7d661bb0f8ffe300fef75e349f1

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