Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5e4a560826e7de…

MALICIOUS

PDF

78.8 KB Created: 2021-04-06 19:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d9d7b4f58d37a2f077241399d443ff50 SHA-1: b0a118b7362c34cea9b19e42f753a317a28e7ce9 SHA-256: eb5e4a560826e7deb7f46c4de056055efb09a77dce5bb612dd4a13540b714faa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The heuristics reveal it functions as a link farm, directing users to various disposable domains, with a primary external URI pointing to 'dugedepap.ru'. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content, suggesting its primary purpose is to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=which+country+has+fifty+shades+of+grey+on+netflix PDF link annotation
    • http://zusiwibewire.mypressonline.com/south_america_detailed_map.pdfIn PDF document text
    • http://predouche.xyz/how_to_share_youtube_video_on_twitter_with_previewobqgs.pdfIn PDF document text
    • http://generalmassage.online/9126484443fstgl.pdfIn PDF document text
    • http://summer-italy.fun/524321794183fxlj.pdfIn PDF document text
    • http://wejnpowk.space/walmart_platform_bed_frame_queen4t0n4.pdfIn PDF document text
    • http://virnet77.ru/23399267914ex0wy.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/command_prompt_codes_for_windows_10.pdfIn PDF document text
    • http://dodapim.22web.org/metformin_diarrhea_after_eating.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/8186858808.pdfIn PDF document text
    • http://salet.store/2015_fillable_1099_misc_form_2017_template1r58c.pdfIn PDF document text
    • http://onlinetiser.website/why_are_canadian_markets_closed_today4r2tn.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/zilomodegijowedugax.pdfIn PDF document text
    • http://ru-payment.casa/vekibesafuxilixinurcrpp.pdfIn PDF document text
    • http://therarbooks.com/pufoboqwu4.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/eu_gmp_annex_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://powagamojij.onlinewebshop.net/43321529232.pdfIn PDF document text
    • http://diwifesatikebak.epizy.com/mejonas.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_3552213781ce4f708490338a7b88fb9d.pdf?index=trueIn PDF document text
    • http://madigekole.onlinewebshop.net/accordance_shelly_crane_free_download.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/25372711665.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/varicela_zoster_en_nios.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/84044215760.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_10f6c35a66f647caa57b8b2175b91e93.pdf?index=trueIn 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_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 5464 bytes
SHA-256: 6df07b1abc8ccec55a8b590f58958333514950b84fe90ca8a16188ca343011ef
font_01_sfnt_off00010567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 11932 bytes
SHA-256: 4ae74fbed65d9aa231ad97cacb73b0b456f31dc0cec9b633d24fab6749b69183

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