Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f6abab6c5103e4…

MALICIOUS

PDF

85.8 KB Created: 2021-09-10 04:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b589096f4018f8b3a2a1cfe28e071e71 SHA-1: 78397034ba009d94969dc62a9a7e494aa8d8b8fd SHA-256: 14f6abab6c5103e491b160cd1fc85509a75b8838d621dfbe55c58ad62bd70b03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to external websites, including some hosted on compromised CMS uploads. The presence of a 'link farm' heuristic and the ML classifier's high confidence score indicate a malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=download+party+animals+android PDF link annotation
    • https://dichvumayphoto.vn/webroot/img/files/93096087096.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/4753833083.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109080908394233.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/41909272412.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16132fd3247d95---30691106451.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/4531740375.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/gusanafoxewagepaxinegitid.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/77978431800.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/sowazakavajugimalo.pdfIn PDF document text
    • http://actinq.nl/upload/file/48748829863.pdfIn PDF document text
    • https://equalland.com/uploads/File/8997600195.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/14315087068.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/mokajetagado.pdfIn PDF document text
    • http://santabruna.cl/upload/file/74022218822.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a83708a264---69747040185.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/loteje.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/32670764627.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/wevujusarupo.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393f37f1eea---88937483454.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/bijofegutomaten.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/fenomafafi.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/77107680892.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/25535239053.pdfIn PDF document text
    • http://identik.hu/editor_up/wavazujokilakujose.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_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 19072 bytes
SHA-256: 667c77e1bb8a9a700165e14d5d8d76e88e7c06b0f46ec297c7d700e79fcd61bc
font_02_sfnt_off00013123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13123 10624 bytes
SHA-256: c4c0215f446132890b1b06f771cddc149e61fd2d548d73094f07cb4859435163