Malicious PDF — malware analysis report

Static analysis result for SHA-256 61067fcd6bdc5952…

MALICIOUS

PDF

68.7 KB Created: 2021-05-14 03:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5db146534702b687d27129dfe7c5699b SHA-1: 1bb8fbb7eb5b0947f6c1d64c0d67d31f8e4c7866 SHA-256: 61067fcd6bdc5952cf29cbacf253f7aa473c485c65fba400a02210f205481734
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://jottigo.ru/strik?utm_term=on+the+axes+provided+sketch+a+slope+field+for+the+given+differential+equation+at+the+eleven+points PDF link annotation
    • https://cdn.sqhk.co/duponetix/srhcicU/bigo_live_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/xewebevij/gihiBih/happy_room_log_download.pdfIn PDF document text
    • http://valaporinepisu.22web.org/what_size_tires_go_on_a_2012_ford_focus.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/rajupim.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/mesidemejowag.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/jfvF5nb/vh1_behind_the_music_metallica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_6030329e09627.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/types_of_admixture_in_concrete.pdfIn PDF document text
    • https://cdn.sqhk.co/tabakotodi/ghiejg0/kunci_jawaban_game_block_hexa_puzzle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fc96c222882e.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/I3UjiRm/pesuno.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/bKhgic7/picu_hospital_nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_6068fad2b5cdb.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/LJjdhij/wanugoxewunokukotonuvub.pdfIn PDF document text
    • http://starconflict-game.ru/35957432101bwuqz.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/2052237099stoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_602aa6da3fbb1.pdfIn PDF document text
    • http://13millions-warzone.store/cricut_crv001_manuald7lbu.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/what_film_to_use_for_olympus_om_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://robopawize.epizy.com/liberalization_privatization_globalization.pdfIn PDF document text
    • http://jusopetikikij.onlinewebshop.net/almacenamiento_de_alimentos_y_bebidas.pdfIn PDF document text
    • http://suboxasolu.rf.gd/linewos.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_off0000c9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FE 5764 bytes
SHA-256: dd634fa2835127ec9de30ebbd8b583a8516e2b105d18eb7c08294f46d6d4c61a
font_01_sfnt_off0000dd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD95 10592 bytes
SHA-256: aabb6d93833ea4908aee668a8f77ae4279c49705c13a5f519c7ec5d709e3b2b8

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