Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce60856f566db8c…

MALICIOUS

PDF

75.2 KB Created: 2021-04-02 18:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3488de6b8ee2f691c4d30204d7815f16 SHA-1: b90c46323dc0d6291db3157316e74d541d3168ef SHA-256: 2ce60856f566db8c7aa9292e6fb58d5b2e98c683dbc9cf4a1ba393ee81dcb930
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://pelibifir.ru/award?keyword=feelings+and+emotions+worksheets+pdf+kindergarten PDF link annotation
    • http://kowojogu.iblogger.org/68287617160.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/jurnal_gastropoda.pdfIn PDF document text
    • http://xinorigevidemo.iblogger.org/encyclopedia_of_modern_bodybuilding_arnold_schwarzenegger.pdfIn PDF document text
    • http://hallop.xyz/38980924246qb3vn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373239/normal_5ffd461199bfd.pdfIn PDF document text
    • http://pilawufatazuka.iblogger.org/19916654078.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/69551385135.pdfIn PDF document text
    • http://axecheat6.xyz/crazy_love_lyrics_beyoncepmvxj.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/amplitude_modulation_tutorialspoint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_602b8d2bef1f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495973/normal_5fc6494edd0e4.pdfIn PDF document text
    • http://all-system7.work/snowman_candy_bar_wrappers_freer4m2w.pdfIn PDF document text
    • http://giviwopifa.22web.org/gajiguzakapa.pdfIn PDF document text
    • http://lightstart.xyz/demiwetipafozebopewi2v4zm.pdfIn PDF document text
    • http://graatorama.space/tezaditutuvogkjkf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokoziguroron.rf.gd/14728678414.pdfIn PDF document text
    • http://zilaxeputeso.epizy.com/business_card_backgrounds_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/duxamirideremubepu.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/apple_music_songs_to_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/kolarebolo.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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5568 bytes
SHA-256: decad77eafbb92220fb63faa897ebe66edce442fd574995d25f2c9200bd7f92d
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 10676 bytes
SHA-256: 8aaa7a01730a41e18e9ebbace1bfa99f9bd293319453615c41e555ea982629b7

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