Malicious PDF — malware analysis report

Static analysis result for SHA-256 22aeed5e5ac8b0fb…

MALICIOUS

PDF

90.5 KB Created: 2021-07-24 03:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e39b19fa8db43797125837cab1e21c04 SHA-1: 554538ed02cd296b0343e625322fa4bc8a7725ef SHA-256: 22aeed5e5ac8b0fbdfe9d54467e4063ac52670b85d8cf453a18548e800bac71c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to lure users to external resources. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous URLs, including those hosted on compromised CMS uploads, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d2733ad03a25254d8850a40c6200dbba/45833248570.pdf In PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/22563703105.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/f4u0dbn4ojp6ddnaqfb9nnro73/13079898694.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7b8cbc3c---modibetojet.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/mulivelovulerakepuba.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/487e0604beca2aef8ded4479056d2bff/56877619186.pdfIn PDF document text
    • http://falerisztika.hu/tmp/80239479395.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/dawolasegativarizinuzukuv.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/zetumupifavezarenafovelep.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4ac49be07e0588d41712b5b094b916c4/6330055168.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f47ce84550ef13d25f53d50b76a6fdeb/mosegexa.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/fizuxeloj.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cad08e9a60---61412945509.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/paleg.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a8b15797766f23b48ff0b27969384b6/32901660111.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f21876696ec31b1c2d5e6ed76cecafc4/furupe.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962e44c5a30---24141797843.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b00500b153d---demaveruzifa.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/cd0de0972f91d70e44d6891943c40577/64757792426.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/84393189222.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/da4ef7c2247faa944257144f7aef80d9/lavevozisewepuzozaf.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/unb7dfgl6tiu9nrs9lpb63qd9t/66102438696.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/mivanesi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0b43e5a85---gofubuwasa.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/15225293214.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160fa95cd4f49a---luvakepedazanaripe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mods+for+minecraft+xbox+onePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 16868 bytes
SHA-256: 67f8dc240da35fd2cc8d0312ee2de0e9e4aff913b318f807ac330f16657ef113
font_01_sfnt_off0001290c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14123 10824 bytes
SHA-256: 0359a0039ab74245b4b3b2cd9c5ac96857648ea380f04c0d972f77fedc2ffc79