Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eac706f0fba30d…

MALICIOUS

PDF

97.6 KB Created: 2021-07-14 04:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: de3460459c72d2d7406bc986620e8428 SHA-1: 47279b345c7d8c80e7a8c726678e1ea219a0e700 SHA-256: f4eac706f0fba30d8e04abdea5f18507a7557e5775ee1b4d350fd136edfa86f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=greenville+license+plate+agency PDF link annotation
    • http://novussiteyonetimi.com/uploads/file/rebifetosevunebub.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c44c4aacdfad24677f89c1d1ab645493/kigewalo.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/47446423507.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/766e71c91225a5d5a6338032acf156d4/66038705187.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608712692e990---24752357440.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093351a6ddca---10862087012.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d6b0424b6fd19d73aef83a1c2b270015/27583508139.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/aba361893f2edb7a969b36a93350d6d4/89116465107.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/aju08hvr129l07kfenmhlq5gpp/21785742642.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/20725632785.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160867286f3794---14846176278.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d95503640c---tigoduposowefudamu.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/72624854113.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afbed7e372b---25318336744.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/or1om4h8erscv8s7p9sbpr9bp2/38358194086.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609634d0bba7d---93622870736.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/22344969456.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/84248408933.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/tuvepupakako.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2e3b85a50---37556737273.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8906072d1---fagoboxejujebivira.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc58ead07---zisasobelu.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/zifedakedijotugaxiwo.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/324994712.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_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 16964 bytes
SHA-256: cfbb9727a51b7ad0d52bc170032ddd8c5182a3bd36d0e023a3c820d652d604e8
font_01_sfnt_off00014870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14870 10648 bytes
SHA-256: 553b47d62b6a6b66dfb1daeeb613e8131af0e8d37ff8ee9615ae6e019d2f0ad2
font_02_sfnt_off00016107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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