Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e36a6f85e5e17ff…

MALICIOUS

PDF

99.1 KB Created: 2021-07-09 08:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 35fd892133272bac987f5441561ee07e SHA-1: cf97dbf3443d840f79ae473fdbcde7b947ccb020 SHA-256: 2e36a6f85e5e17ff4411fd75e03019b594eb2df92197fdd894fc1732c2698989
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://aroma-es.site/yamituki-n/uploads/files/rupugodukewuposupagasakej.pdf In PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/liloboto.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/45807030478.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/d1540cb12ede790fb9bb000fa6b90954/xusedebazafoxiradixu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/sesobepobitiwuvixuwisibek.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/90733321457.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/t5mcdbdtsvi6ksuqg81iqpur7s/66730776577.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/59983937595.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/52326704949.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/podiwis.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/59978251722.pdfIn PDF document text
    • http://kme-kme.cz/files/file/44815144563.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/o7h5t5k8atud0j7bveja91jh4o/funatigawujogopedoju.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/4898a8794ff2dba7fad65654fc0b6b07/30972943062.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d59444df44---vezubokitewipuzirufupowet.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/8vtgo784j4gjvohrj7abhssdd5/52508333898.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/68340403562.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5c06eb92e---12315663489.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/lk9fsh934l81m7ev511633l9ge/xusiwopitukak.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/df9ed60a9cd7b11480bf34f16ebad96e/kinofaf.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/k9h6hfduqe00ei0ifaje1ko4tf/vujip.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c25e0e525f0ffd2fd7bede8d0b8689a4/runefiwegijajifunorezakut.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb97725d5f---71451672420.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607904041e828---zoweligemonugosumor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=fib+meaning+medicalPDF 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_off0001223d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223D 17588 bytes
SHA-256: 7ba55410b9f5a4449256df2052386d6d12f1bfb08721c468ca6a535db87e1294
font_01_sfnt_off00015042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15042 10344 bytes
SHA-256: dff9615aa9cdeca913987ef27b5c2ad46f936baf0fd2c7ab0e6a9cd4e4ca7e20
font_02_sfnt_off00016746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1