Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5768092dddb3df4…

MALICIOUS

PDF

126.0 KB Created: 2021-04-03 17:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46ed844e68c9c6532955382418f5139d SHA-1: 5952cf811f844f6fdc4ab335d4905b13ba5d423f SHA-256: d5768092dddb3df40bc1cb7f8ffb42f88a6069464049ec2aee173dca7a5670c9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://botokaw.ru/123?utm_term=bodybuilding+photo+hd PDF link annotation
    • http://vawifasu.22web.org/62800293080.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/zLjoEic/large_venus_fly_trap_for_sale_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuzijix/cwheAig/jezak.pdfIn PDF document text
    • http://zozegakipuvi.iblogger.org/guru99_manual_testing_agile_methodology.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/hjjh1wl/swepco_longview_tx_phone_number.pdfIn PDF document text
    • http://folejaf.mypressonline.com/how_to_crochet_waffle_stitch_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/hcvgjjf/sloth_from_ice_age_with_glasses.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/paradigma_konstruktivisme_adalah.pdfIn PDF document text
    • http://jarisudowapebi.sportsontheweb.net/language_barrier_essay.pdfIn PDF document text
    • http://reactivaperu-2020.com/sirevilonojuwovatetusita8d2jg.pdfIn PDF document text
    • http://lishop.site/heidegger_overcoming_metaphysics2qkjp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovizomaguwex.atwebpages.com/child_centered_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9d9ace-b581-426d-bbb9-f3bec6fd25d1/chess_strategy_and_tactics_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7dc015-79c4-4dd8-be1f-f005a03b0721/30988833467.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_5368b73f2be541dcb91c4c5cc8a024a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8dd9b83-de17-4a6f-873c-652414283f6c/gospel_of_the_flying_spaghetti_monster_online.pdfIn PDF document text
    • http://gorosojipi.rf.gd/wupezulu.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_13ad7fe7c6c64590837b52d8a0464ea2.pdf?index=trueIn PDF document text
    • http://vejebuta.rf.gd/31740930752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b24d7c2-2f47-401a-a44b-fc89c3ef7d8f/mejasezolu.pdfIn PDF document text
    • http://levowemorunob.epizy.com/rofad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c225e7a3-7a1a-49ca-a02e-26d4a5b471d9/xikidusinifutidis.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_off0001b19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19B 5028 bytes
SHA-256: 7c8913c78c7e27cdb434597abb0c0a25ac7389956ac74f437805eb79c582c3d2
font_01_sfnt_off0001c2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2BD 11456 bytes
SHA-256: cef416a91351752186ce382eed6f05acd73d43ade06f8532e9d9168983852ec3

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