Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1a56837096e615…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 11:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae17a2defb7dfb68d7c76838ea7926b3 SHA-1: f1639615279d35828e40de44041d85130518d3c4 SHA-256: 1c1a56837096e615eeab26122051ed882ee7af06c64da7adf143995a090bdf1e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is https://bologen.ru/award?keyword=beauty+box+corporal+pdf, which appears to be part of this scheme. The document body is heavily obfuscated and unreadable, but the presence of numerous external links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=beauty+box+corporal+pdf PDF link annotation
    • https://cdn.sqhk.co/seponidozit/hcggihC/63209753275.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/ajbiiDx/zanotasesenoparusuxobi.pdfIn PDF document text
    • http://rukakev.iblogger.org/isc2_sscp_study_guide.pdfIn PDF document text
    • http://jimefat.22web.org/81368761519.pdfIn PDF document text
    • http://balonedud.iblogger.org/juki_sewing_machine_parts_book.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/ghRjagc/29366618602.pdfIn PDF document text
    • https://cdn.sqhk.co/bojodunaluko/eGEyTjf/printer_3d_laser_cnc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piserujirabubam.epizy.com/crank_books_in_order.pdfIn PDF document text
    • http://kibululugavi.epizy.com/ammonification_and_nitrification.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_e39531f99b80471eaabf9a7a58f8a72c.pdf?index=trueIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_cd8c01e8b54d4c1d937a24e222d68e16.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_f2ac7fb02a784d3c81718e9117bf2d4a.pdf?index=trueIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_42c089086a9a4a8aaa9d0d65adacf90a.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_83e7af53add246f4849d206f63319068.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_409c07972d034b01b5bb92b5264dfd23.pdf?index=trueIn PDF document text
    • http://xigoraviwa.epizy.com/berliner_platz_1_vk.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_f7e5ac2501144912b976ddf27cb4ee74.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_f4658c4e9b04416dabf222b8e6bec0ed.pdf?index=trueIn PDF document text
    • http://niginikixino.epizy.com/ssh_secure_shell_free.pdfIn PDF document text
    • http://suvalon.rf.gd/laxupemixetakosiv.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_eeb857c0c93a48be93d94c9a0603fa03.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_106eefbc0eb34624b4f93acfe8bdccc4.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_5090ffd76cd240c7bdce843b703903c1.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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_off0000d93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93F 5332 bytes
SHA-256: eac22f8a9beaf54d1159a66179fe34c949905ac4d429a64af1588a26aa1c4993
font_01_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 12292 bytes
SHA-256: f910c74cff860f67b3cab2a0348cf7bc2b6620a3f0cb304657fd069281943cd9
font_02_sfnt_off00011326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11326 16076 bytes
SHA-256: 3088de61ba4d2b01ab234d84e40a42107c4d30a52b1b9bdaf8961d49da71d313