Malicious PDF — malware analysis report

Static analysis result for SHA-256 07377d29d6af7dc0…

MALICIOUS

PDF

87.7 KB Created: 2021-08-28 12:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3c27f13fedb815977a25aa951999520a SHA-1: 5aee1d89eb8383fe963363e8367aa099995871d7 SHA-256: 07377d29d6af7dc0eb18eb38ede88d86c653dc2b193956cd8e97b9f3ad72fdaa
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=what+are+hypodermic+needles+made+of PDF link annotation
    • https://gemwares.com/userfiles/file/65892055531.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d19431b3c---kadute.pdfIn PDF document text
    • http://tele-video.ru/upload/files/wuranonareboxajema.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/92931350429.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/bujevumelu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c755be9a591---jizabuw.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/66838703738.pdfIn PDF document text
    • https://akvaguru.hu/user/file/52945386586.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/k3f6nuvtmainhhkfjnc8p0omks/sazok.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e2fb8aff7---webisasijofimevigitepimi.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/09b3d44a71509b55dfb9ab7fbed6430d/98250397517.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/mobogiburixasadirinaj.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607361391b9fc---21170725997.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/kujepotomibuzesajewoputo.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/08a68c739bbb5e4b2ba4d68354f1021b/sosafa.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/metorexarosux.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4qg8tcgmt3gf182s658b6lgcgc/86520160194.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/812025b29cabfa830d9d20cad4ecce8e/zatikuwakupa.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a8174f63b6b84eb4889d7de20509bcf8/ganamifimazikixo.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/texujekopevuvapadi.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/11691941847.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210728003702.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_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 19200 bytes
SHA-256: 8e65ad2adccded3ad1ea33ed6fae284df24936506ea509933be4e63c8b7ae3bd
font_02_sfnt_off000137fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FB 10992 bytes
SHA-256: 49cac0a12b8999ee1a83553171256506543f2c176e92e0606282650f9bfe647b

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