Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcd7b6c89a320db…

MALICIOUS

PDF

77.3 KB Created: 2021-04-21 02:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: be595438b3ef3fc83f673a5a1d163c4b SHA-1: 3b7d2fd033e548860a1e913dbdae62342e78dd89 SHA-256: 5fcd7b6c89a320db05856fb08037497977b1d7fba1c20e09a4c873ab5f1f3185
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL leading to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=what+is+the+fastest+rapper+alive PDF link annotation
    • https://cdn.sqhk.co/wugeguxu/gAKaD4D/68220574315.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/YheiigX/78541548902.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/xd9igWQ/cute_octopus_drawing_gif.pdfIn PDF document text
    • http://dihtyar.online/gopulifesujadaxufox2lim4.pdfIn PDF document text
    • http://esagafow.fun/1649001458copkp.pdfIn PDF document text
    • http://bonboxstudio.com/how_many_calories_in_a_medium_iced_mocha_latte_from_dunkin_donutskjozc.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/gfickCT/nosenoviposiretiguka.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/Phbgejh/98580550135.pdfIn PDF document text
    • http://lawyer-consult.ru/apc_back-ups_350_battery_backupkrkng.pdfIn PDF document text
    • http://electorat.org/lake_oswego_boy_scouts_christmas_trees_2020v2oi8.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/faxidexodanopefosunv9cd.pdfIn PDF document text
    • http://differencecheats.net/sennheiser_rs_180_wireless_headphonesvm7g1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86683484-4585-4c1d-b1fc-9e2ce1eb44d4/62720582242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8e42c6-3a30-46ae-85aa-c5128505b8a2/80248506456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3be4c6-bad6-4e98-8280-71346b943aa6/32821645768.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/32305485576.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/daily_themed_crossword_answers_movie_thursdays.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/43081875507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bcc5bb-9908-4da4-8b74-e7aeed9bafb1/black_and_decker_air_fry_convection_toaster_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/86968893461.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/jojulojiwisosifemiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31f0771-12dc-42e9-8e78-3d04510501bd/2004_dodge_ram_1500_led_headlights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c056a24d-5b6c-44d2-b9bd-aae569529dbf/bovupowotoxiba.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_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 5064 bytes
SHA-256: 008e0fd5cd49391778f6a46b1cbd774cf2f3dff5df606ce2fcf19c7f7e0b6c72
font_01_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 10932 bytes
SHA-256: e2e4665ae5f3685b53cbf06a8fb067d45615c713e2ef40af21e352b246eae652

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