Malicious PDF — malware analysis report

Static analysis result for SHA-256 def7eda6795944f1…

MALICIOUS

PDF

84.2 KB Created: 2021-06-25 20:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e8eee395b6c1d484091b0392d3d37dba SHA-1: 9a9589b96562c1e77a48c9ef8f756d7638f053f2 SHA-256: def7eda6795944f10b608e2b223786219e9066dce980ced2e4fe1de920a56754
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/530eabb005e7d069776244e7d574aba6/48657398665.pdf In PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/24500181856.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/41350413610.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afece3873b---39292896894.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f2d7aa40e947d15d608361ec20d4ca1f/mosedutejesexaluxijab.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/panujin.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/85686800875.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/06-12-05-44-51-53.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f921cf07b---72250141106.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/h1dbvle3i8s8v94ronn7ldv7g0/rizozufipodusovifebiga.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/mudomikifubetimibokodirof.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/95860275498.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/941a5ee80e179d263c1b057980269aa3/nivopiwikifuritaxodozi.pdfIn PDF document text
    • http://come2menorca.com/images/file/vogidozuxapogosasazut.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d69081d8f---71765941494.pdfIn PDF document text
    • https://usdcp.jp/user_data/userfiles/files/lotujikaxifa.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c95f79e834f---152558244.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/43605163362.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/bigosuxufomabumusukim.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba227be35---fotito.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/bcda8aaaed0a41c150b55151e27679d3/fejezisamivuzonapasawabas.pdfIn PDF document text
    • https://ivaco.it/file/xagukaxobibeker.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/59851681106.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/1648a811220f32c262fbeed9adbc9a37/38662147975.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160760ac3a5c8c---mesoviramaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=sick+sinus+syndrome+icd+10PDF 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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 16900 bytes
SHA-256: 84a7f57ca3eba9a098d681b91cdfad38cc5ba7da48214847fb4ff1e57048901a
font_01_sfnt_off000112df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF6 10780 bytes
SHA-256: 05282538ff7fb6b27c680085212ac4184fe440c781ee3155e77d2d4b238b8b06

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