Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b2cebeea9e534f…

MALICIOUS

PDF

81.9 KB Created: 2021-08-07 15:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3d9375fb4baa31ca7a9b762349dfe4aa SHA-1: dfd53d32103fe705fefb548faa44922f022e3bda SHA-256: 80b2cebeea9e534f6bc9e93905848fdd155588c4baebdf2fecad9f18cff43930
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. The file likely serves as a lure to direct users to download additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=gba+emulator+apk+mod PDF link annotation
    • http://szentistvanpatika.hu/upload/file/nemaj.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/lotulupepilawidabamovoxal.pdfPDF link annotation
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75f12f1cd54776d07c01d63da386698f/78379347083.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/nb33lf4gt8t74n81v3kthone73/29045055108.pdfIn PDF document text
    • https://bdata.vn/upload/files/13333940504.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/xetipurunenoloxupinanunun.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b519a294c7a---90913179380.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6020ddaac04dc8e02cf3dc72e44a2b2f/xokibelebiduboroxug.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/66838002160.pdfIn PDF document text
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/43506155873.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a709e4bdc87---sajotegunamisi.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/vubedepoxaka.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/29550442195.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160980c4f0af99---5235337325.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/famemabonedepit.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782d1e87b7c---6759486590.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ev78hcn8jd8ba4uvt6a92dgv43/4389194311.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/lisukisola.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc1f5bf0bb---41695142930.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/sebakirumuro.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608167fb37487---ziteposafusewivojafol.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/13483196733.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160efd6276fdb5---lufufanewokagubibenot.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f454eda59---98610390084.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_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 10560 bytes
SHA-256: 15a5797c65f86d67e21bbad35537a56f889e4604c95ae08380c3beb81098e968
font_01_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 17340 bytes
SHA-256: f94a1bb030a544ce828547170634d5faa6ff8e92d055d4ee10960d21f00a5473
font_02_sfnt_off00012133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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