Malicious PDF — malware analysis report

Static analysis result for SHA-256 e178a2bd659dd43a…

MALICIOUS

PDF

77.4 KB Created: 2021-07-16 14:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f06635a5e93683f46b3f4bc52d174e77 SHA-1: 934426723a49178dded0c2222e8dde7dfad963f1 SHA-256: e178a2bd659dd43a9a5e4373abcd3fa22ff77948c07f0a3e7414f39de6bf5222
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external URIs and is flagged as a link farm, suggesting it's designed to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://huntic.ru/uplcv?utm_term=total+control+lee+parks+pdf+free+download PDF link annotation
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19067e404---ripokemi.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bf1c8b33b23b3debc05cc239a141c943/73403189464.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/irfkkbbia8gkolkokddiih8bkq/rupofo.pdfIn PDF document text
    • https://datajournonepal.org/files/13255136463.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/8cc93ecc4359cc39e326903977d300e3/80488163099.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/dojamuxi.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ddccda09d---mofiwob.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/1c75c25519ae6bb3d39311cd6cfc4653/torodorugerinosagoku.pdfIn PDF document text
    • http://slsnn.ru/content/file/noladofev.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/39303064442.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/18386912206.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/q1ubopj8rdoc18and4oavmme05/newikutilarawuk.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/dukfld4iqj0l72kkbmo15tibi3/devunufatanopuladubedov.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/21beebf60b6f19551c13c1e6034d1943/14647049328.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b48f336eed1---52633282937.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/vezatulerabunifof.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/12731408848.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/885ivgrqth0bc5g6amc1bu8kht/niwazovafokitopaki.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080662f83b0b---69511323367.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/15412201389.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/a53d22ff5ba61786e7a4b5ddcec12e7f/tipevolimarow.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/86535a3614e1f455bc8c2cf348f5cf74/wigesoni.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086502cc610f---detefe.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/89562861084.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_off0000cb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9D 10660 bytes
SHA-256: 15cbac359dd4fe5412372890b6e1762dfb4acea7c3a0c5212a4dcba7a0abc3d5
font_01_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 16980 bytes
SHA-256: 7c322d84619947cf12e6428b15bc71c34cc67ee741b0b044c7ac978b701cd03b
font_02_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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