Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bc917873de609a…

MALICIOUS

PDF

68.4 KB Created: 2021-05-27 12:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aae626fb83d1ba97d6f3c139f87dc0e SHA-1: 4998bbf9d33d9a5bc43f47ebc6d6ec5449da385f SHA-256: 13bc917873de609abe0bc62b7fb97db9cb2e4c8b013fd60446ea328ac8bb863d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to other PDF files hosted on compromised CMS uploads and disposable domains. The document body, though heavily obfuscated, suggests a lure related to software development, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bgmediation-flm.com/userfiles/file/30135532323.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092cd97131f3---kowoxud.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/13868535940.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/771d2bf176b6b8e47d879b4288eec2bc/58360547249.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/dc3e712c325dababeb12eee97d02ccd8/70804129904.pdf
    • https://arhometutor.com/userfiles/file/zokuzarepupogiwegijujezuk.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/donefapafiladef.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608641ed58f9a---sonoloniranere.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/c276a8e4fd49cdac285a01ac67d96f4d/72534913532.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a80e4349ce---43100754639.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099eb9b50c79---25112835946.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160905f5166064---lizilavuxawalasevuzagi.pdf
    • http://sva-jeanroze.com/xmedia/file/xigaranus.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a118547a40b---sogufakamogupujedebed.pdf
    • https://angelsstaff.com/uploads/file/96919960463.pdf
    • http://angelcabrera.com/FCKfiles/file/sofakozuvavawemarum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+use+storyboard+in+xcode+11
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf3f.bin
0e98585209959894f5c6b4f574cfba502bd86cb48c5cfc911f583ac7f9decb0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3F 5316 bytes
font_01_sfnt_off0000e179.bin
712c9198d042c67d927f6b6287bb193d939f9b55bf4d77766ce3c9d2baad41b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 10228 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.