Malicious PDF — malware analysis report

Static analysis result for SHA-256 560c9b29cdb1214b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 17:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3a767dd93fafd5f2d5fe74e7e6672d5 SHA-1: f06e318479dbf64a75169de09bbf74482ea1ba5a SHA-256: 560c9b29cdb1214b6239f35c638690943795c5b846d605ffd0472030050c5825
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the document being a link farm hosted on potentially compromised or disposable domains, designed to redirect users to other malicious PDFs. The presence of embedded URLs and the nature of the heuristics suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/1143ffdc6066b33c9755c6755769fcfe/52944832849.pdf In PDF document text
    • http://dentherapia.hu/files/file/xixudiderobaluxiwute.pdfIn PDF document text
    • http://www.heksan.com.pl/file/wufasasozudodoxudotatowa.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/j1rju274a9ld1gop15u2hnu6k9/10731256272.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d58561bca8---vopamemaroxolevupomuwe.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160875f15e058a---bojelewikilugubafa.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/gazizuzezokoxazasimeluzir.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160854992dec84---wevasodasaputufuluvi.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/jililemigodaroludolo.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/cae3c48ffe30379a9ba0d3c0bad2e21a/jagaxapuminitej.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/19173463179.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/bcc1ed21778fe9f673851f136eefe3c3/zomimev.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f56b716f730---natewezude.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/putedawuwuvikol.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/05e737e269e9a557bf9fbf1acf4e1f61/65194167469.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d8b4c540---81594386943.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/b47497e871091bf6addac42594ee16e6/23062871735.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ljud7ufugn5bm5gu84hs85rqeo/tumogigamir.pdfIn PDF document text
    • https://beaszemin.com/files/gawulowawawipujade.pdfIn PDF document text
    • http://teplospectr.ru/images/files/78344973605.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/31141972458.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/95343331132.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612186d50712e---pumipojaj.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/defokurido.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc17dc16d59---29738612455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=biomes+chart+worksheetPDF link annotation
    • 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_off0000d2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BD 17664 bytes
SHA-256: c6d5b228b3c6c9530777d426ce14f741faace12ab158f2c371eec67fcb92d60a
font_01_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11829 10576 bytes
SHA-256: 0bdb4cc597621199de896c79f3cad9ee750067c6753d97e6485b89d82377db21

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