Malicious PDF — malware analysis report

Static analysis result for SHA-256 74310ceffa8a78f8…

MALICIOUS

PDF

75.7 KB Created: 2021-09-06 20:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6380fb66248635f9c2f21dd5e58b88f4 SHA-1: d8c1ce06a7fc2907854bd67325326ffe26f26b67 SHA-256: 74310ceffa8a78f84488126cb9690e1c726156eb78b3c00a227774402dd1310f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://drafthe.ru/uplcv?utm_term=antrag+kindergeld+pdf+download PDF link annotation
    • http://xzass.org/ckfinder/userfiles/files/bebarovabepavesew.pdfIn PDF document text
    • https://sibconsulting.com/contents//files/bevifekubawowogi.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/6sh36p9r9ldik8p850f7qcotsk/1945438147.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/etgd9g22nd8f4qrua2ie2qnj03/20391657220.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/tewojoxizukovebesotixefi.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/9klp99d8as9gpbkb725mbhtflo/15239595399.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f4d01e66b92dcdc0ea9812b6b918bfb3/63582538727.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rapigosaziroridakej.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085490c0209b---2437701066.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf9783671---61870350215.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/84341823915.pdfIn PDF document text
    • http://sentai.cc/data/file/20210814_111503_347.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aee922c1c---mowuxivakako.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/vakufefo.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1712ac2e6157e8fffee5acedf2239250/pikolezerixazagikowas.pdfIn PDF document text
    • http://amdind.com/userfiles/file/xanikebominabi.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/rufogozisubizepoxaso.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607033970a021---40410885694.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/4706797429.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc78981b49---pazaladezumudoroma.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/bda46578fac74cff769d8e857f52f4f2/kujunepawedojavukevix.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/nomap.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_off0000c2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFD 17668 bytes
SHA-256: 7f2d5450ae267cd43df917a0a89359d1692312dbdfb5e54eb69b496f93a7add8
font_02_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 10664 bytes
SHA-256: e35e866074b6a52970871523d3b13e262d5e59dd59a5f9f24dd3c8a0175813fd

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