Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb3695690c984b2…

MALICIOUS

PDF

71.7 KB Created: 2021-04-23 07:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dbf296582495066b287e772ffcc0c72e SHA-1: ea3b719efd7f2a4c16671290c923b3b1573c33d5 SHA-256: ecb3695690c984b2ff4c05288c85c98a42c642d3138f4223d9a320070c1a2db2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=genie+pro+88+program+remote PDF link annotation
    • https://luralaxigagu.weebly.com/uploads/1/3/4/8/134868525/koxede-pivefev-sakaloxa-fipuzeduwafonu.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/hcPtQjj/92450903587.pdfIn PDF document text
    • https://dazuzezabemor.weebly.com/uploads/1/3/1/3/131380892/dudonise_wisapa.pdfIn PDF document text
    • http://fruct.space/49316332648midlj.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/dDhbRhB/98151722599.pdfIn PDF document text
    • http://top-agent.ru/unreal_conditional_exercises_with_answerskdi3x.pdfIn PDF document text
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/novoxiduzetok-jiwexixeg.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/memubarolepeju.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/does_calculus_get_easier.pdfIn PDF document text
    • http://gta-msk.ru/bekobogugowams14w.pdfIn PDF document text
    • http://italy50wow.pro/joomla_breezingforms_cache67gyj.pdfIn PDF document text
    • http://sirunome.mypressonline.com/61374816161.pdfIn PDF document text
    • http://replyua.site/4435457838292p9y.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/lV0hem0/balance_ball_3d_game_for_pc.pdfIn PDF document text
    • http://help-nanny.site/minecraft_new_update_2020_release_date974d9.pdfIn PDF document text
    • http://trysalon.xyz/54782051395350u.pdfIn PDF document text
    • http://discovljzg.fun/krups_beertender_kegs_for_sale6vj4j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobozezojip.onlinewebshop.net/muwanekoribejaxumux.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/99389874450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b36bebb-541f-472e-b2c7-2187e9a6a629/harry_potter_and_the_order_of_the_phoenix_pc_game_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990e93b3-de97-4ce5-a7bf-663e6f6b9639/bivedekixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714b49af-2ee6-4ea7-b0b0-fc6d1af8ff54/dell_2007fp_20.1.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_off0000dcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 5156 bytes
SHA-256: 210a3e241ecb5ab67122b273a5cf1fc82118f44b3e347ad69e2ec75dd9ed7f5c
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10092 bytes
SHA-256: d6e2a33b3bf4c6210df71460501af094b26380efc9a17d2d904fd31c3fb1dd18

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