Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd504a71a07bb4a…

MALICIOUS

PDF

76.0 KB Created: 2021-06-28 06:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 560746591cb66efaac8a26fcdd46440f SHA-1: 67ac03ef030b203a50d8db917083882697c1aa91 SHA-256: 7cd504a71a07bb4a64afd7a59844cfdf65b736dd2afd083e3cea1b2b9282a995
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution mechanism for phishing content or further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://queure.ru/uplcv?utm_term=diffusely+infiltrating+glioma PDF link annotation
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8309a2f8e---vatozomubizeludowujot.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c61b79598269033dd1f536919606dcc1/18642924552.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9d34c8c21dc65ef041365d4fae4d4347/dalojalevelavefolegutofag.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/ponirilolesipefu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3d277354c---bowajirikodezepabokowo.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/vepaleba.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/30807663828.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/40b6bceacecdc915e486cc77f64b0ce9/jitusiwezafuweginuj.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087e77c6936c---51883718072.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/navikifaxigibis.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/lrakp6rc66tr92ehgom6s62ln5/52586791782.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/f20tb32rjob01lh7ekemegtkp8/21677506781.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/koxojukamomigadefuk.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/41397167686.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qio4mviehnhctorb96m5crnl5i/vewejulomijivapumobunakas.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ac3c6a993---bewogetedamilodaf.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/149dfd9d055acfb3f6eaf113534abc95/41492451892.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/58563467963.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/cae0bdb8e5b01909c6da6e5f9eaa361c/80809922159.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afac4727c6d---dozabajewijamugivedazova.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/j299vfvqk73r5g9rikn9mnm8u6/velifodirefesarudiwutu.pdfIn PDF document text
    • http://snypes.nl/img/customer//files/sikeliju.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/zaviwudevitukukubesaguv.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nmad4jfhfu44tq8evjaeqe5vc4/76878315717.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_off0000c879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC879 10772 bytes
SHA-256: a795efc1f9a051c221a3449cca42d2885c0ba9c1bfb67f7f1e314456eac98750
font_01_sfnt_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 16064 bytes
SHA-256: f0889d12d765536fe0dea6fad7b6cc8282b077ad92aa7f60267e242c3b52b8aa
font_02_sfnt_off00010adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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