Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e4a3d5088c6756…

MALICIOUS

PDF

85.8 KB Created: 2021-09-16 18:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 297d8c9884bc762210233cf2adda66f8 SHA-1: c215db384bd06e5316c8e5cfbbb6c046054f3150 SHA-256: 77e4a3d5088c6756d02ddfe0b86da8e5cf474857d1e698dc6874b80761953a7c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/39e919d5d4ae756a3d4e84ad88877307/69331848313.pdf
    • http://standardamulet.com/files/files/kutexutajokiwirali.pdf
    • https://eghamatkade.com/basefile/eghamatkadecom/files/84807246401.pdf
    • http://comlark.ru/userfiles/files/movixizinodupixuwidab.pdf
    • https://flour.co.uk/ckfinder/userfiles/files/madovekexemav.pdf
    • https://truonggiangcompany.com/userfiles/file/59358706713.pdf
    • http://moto-bike.pl/userfiles/file/sapules.pdf
    • https://markaoyun.com/calisma2/files/uploads/51505313770.pdf
    • https://maintogelonline2.org/contents/files/75323429302.pdf
    • http://wingmanresearch.com/userfiles/files/13434877097.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/qe0ra6eh2ml67erpq3m30mnvi1/lokibimogobokogula.pdf
    • http://porpora.group/imagenes/imagenes_contenidos///dijawiposomip.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e44e2157c---48392735896.pdf
    • https://giaphutelecom.com/tctt/sites/aaa/file/zoloxefirosubozameleju.pdf
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/tejimopogapopezem.pdf
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/21587156513.pdf
    • http://zhymwz.com/upfile/file/94464603570.pdf
    • http://infrabud.eu/fckpliki/file/92821440382.pdf
    • http://atmaircenter.com/lb/userfiles/files/15165566876.pdf
    • http://alanurturizm.com/rsm/files/17640502715.pdf
    • https://hongdung.vn/ckeditor/images/files/44694639131.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/60462624132.pdf
    • https://muratay.nl/userfiles/file/popavavefuvanofavupemak.pdf
    • http://aspbae.org/userfiles/file/57441964180.pdf
    • http://eyela.kr/uploadfile/fckeditor/file/79710163099.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=free+english+grammar+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 16792 bytes
font_01_sfnt_off00010254.bin
7acccd2a778c972235cf310c6154498c3b8d7e427462549c9338fea92442a0e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 18128 bytes
font_02_sfnt_off0001313a.bin
eb7b389d11151c158a169d60cf9bfc160118a45b5bd47e87abfd559aba68b710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1313A 10704 bytes

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