Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac206c185a07ad17…

MALICIOUS

PDF

75.7 KB Created: 2021-09-16 01:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0e99294c4a7e7a090001fa2c266f3987 SHA-1: c25d00727c97fd16961587e35073b79b0e23f361 SHA-256: ac206c185a07ad179242180e24780fe3c28fd1a290a2ee900daf4b483645b8a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that masquerade as downloads for popular software, such as 'God of War', to entice users. The presence of multiple compromised CMS upload links and disposable hosting suggests an effort to obscure the true origin and purpose of the malicious content, likely to facilitate the download of further malware or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://catamma.ru/uplcv?utm_term=download+game+god+of+war+ps2+for+android PDF link annotation
    • http://klhl.com/userfiles/file/60791190953.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c56b10633d---99774376037.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/kikeredujoramogidax.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140697c4c368---roxavasateruvagowamak.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/86516680864.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e14f59c7e9---sidaxugozifipikolefofi.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/jenax.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/42858423381.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16139db2643eaf---koxejo.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16141136ebbb04---33367203746.pdfIn PDF document text
    • http://jadeite.ru/images/file/mojizibanogikop.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/jewis.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/dupepuzopavipuvusifiv.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/75655391556.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/musafazarabufefisu.pdfIn PDF document text
    • http://preiss.at/upload_files/files/xavizonolononutinir.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/16514359835.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/5566386333.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/juvomugabuxegukebabusireg.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a80a1bfcc5---79705884135.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/jopapepamalo.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/9672357479.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/045b9c046de31181206c5c84631f97ca/44473789758.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://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_off0000c4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FE 16528 bytes
SHA-256: fa615c2e2fcfa28c0e1e701802307896ff272ba2ac1e0dcab7ee58b77d9ea929
font_01_sfnt_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10785 10952 bytes
SHA-256: a26349038826135e581010a10f80cf62dd9f49c53dc1803cffbabb9f58343b7f

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