Malicious PDF — malware analysis report

Static analysis result for SHA-256 726ba3d86b8006a1…

MALICIOUS

PDF

86.9 KB Created: 2021-07-03 00:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 434c850587a33d16ab223c8be8f30bac SHA-1: 9b333fce4c448398fdd68d347b9c4ee94b5e33f2 SHA-256: 726ba3d86b8006a1aec07f2ec10dd837d6ddf3e456af217447e23b3bf0b124e7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, directing users to various external websites, some of which are hosted on compromised CMS upload directories. The presence of numerous links and the nature of the hosting suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://exclusivelimoservice.com/ckfinder/userfiles/files/96529470017.pdf
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/tasubiwerapudi.pdf
    • https://tlproduct.com/userfiles/file/46125606939.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/2morh2rj84u4qo1mmsln313f7o/79188560784.pdf
    • http://szentistvanpatika.hu/upload/file/14690510911.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e59f90396e---dakamewo.pdf
    • http://sllight.ru/design/img/upload/file/mususagonawugixif.pdf
    • https://angkortaxiservice.com/userfiles/file/koforonuvivarufekapim.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac42666b570---80884791817.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/kij42d6v0uvm1jshu75ed3jq71/livuputozunekudo.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/a45aac8c2cabdb9fd9df1ad9421f9e8c/59194872548.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f834fa365f5b04db3efd4be8c59042a4/rutewiluta.pdf
    • http://mdc.ir/ckfinder/userfiles/files/33628445486.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c82ce032d---lukusivozexuramonu.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9f8e5204fd2485ae4e0e6490ce5ac0c/silepujevigamifakukowitud.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/59644c336de4ae13a25fa538e01697cb/daduxunitugimexuxukurok.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91fc397aa---tugazor.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/35d3411d44c8b74b6247813e30ee55b2/gunerugikezix.pdf
    • https://institut-arabe.org/ckfinder/userfiles/files/ledinibogajozogi.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3cb52eaad---wenobivabalem.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c958684bf7b---luveguxu.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/85c55cf3f3f7626a8fc845deab96b560/2195168924.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=dominos+pizza+sauce
    • 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_off0000efaf.bin
e0336e5c9e91315ab547293052477a51c6ddfdd17747344ffbeed618d37c4ec2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 10452 bytes
font_01_sfnt_off0001076b.bin
c6f2533eac09db4a2c5e071c538621a388c5b00f37ecb7816eaf47756dce4bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 18128 bytes
font_02_sfnt_off000136bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136BF 16792 bytes