Malicious PDF — malware analysis report

Static analysis result for SHA-256 f578ed02ab34ab3a…

MALICIOUS

PDF

96.7 KB Created: 2021-08-11 12:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b89631d4659c1ec60c668d67c1ccf21 SHA-1: e18af5cdf0e5ed022157578c29b5b267e0455b09 SHA-256: f578ed02ab34ab3a42cd9f80461565cdb900626510bcddf5856b3ab4c2d26c29
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing pages or further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://crewmak.ru/uplcv?utm_term=risk+assessment+matrix+example+pdf PDF link annotation
    • http://kaupa.cz/userfiles/file/gajetanajakazerofebivox.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/golufajezoriwabejejaduw.pdfIn PDF document text
    • http://edelstar-mos.ru/files/larorob.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5fc6880b160f0f2eaf15ea260cbac876/28461069142.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/08f6c744cb5f9ef99e261472dda88555/59959575983.pdfIn PDF document text
    • https://orangerun.re/photo/files/vekabelevuwimovelasividob.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/24408442911.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/cghmnii5dng4h5ul0p8cfnhdi5/59088313257.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/dcc1be373ebb93696672fba372db8e4f/medutev.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/42648967337.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d9079f588ca---radepibekurukak.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/945633665de6024ba817c1d5bbb4b18c/dakorev.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/juxozobuvananawejov.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/10f50f49a00fb013cfd2abbb813d96eb/78422539779.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7eb669198e6ef26a7e11dc536ddc524a/gifopug.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/af37b814f0caa81a22b877cb13709b4c/porubarepawajinobewapox.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8b587fc6209facc0caf4ee7ac23c608f/genopamizumin.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba994e3e692---zivojomuxadutudewagopepuw.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608183b14f92d---maxavefelunupawufora.pdfIn PDF document text
    • https://red-adlay.com/upload/files/57158826379.pdfIn PDF document text
    • http://abpaluso.com/upload/file/sokafoma.pdfIn PDF document text
    • http://banquat.com/userfiles/files/banememujotet.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/cd1cc7376c312b4e6684c68f4e460475/vatedojobe.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afb29d6ac5f---27727758374.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501034825316419.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_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 10776 bytes
SHA-256: ac99ac12513adc291d592531d95b8705752d6fa4875e2f9615a4195407dcb713
font_01_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14478 17600 bytes
SHA-256: d6de17201c3d48b0c00038c490eb4145913b8d4deaa01b2369798846f218b721

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