Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fe09a1fa29adc4…

MALICIOUS

PDF

72.3 KB Created: 2021-09-20 12:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 2d09cd4adb50d39b46baddf678281a4d SHA-1: 50f690fa7097634ac5b3b421f1f14a43b03366c8 SHA-256: a1fe09a1fa29adc440275e285f102b34c912f9733863716ebd6e7f80371f8631
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic findings point to the PDF acting as a link farm, with multiple embedded URLs leading to other potentially malicious documents. The presence of urgency language further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kutyasturak.hu/images/files/roparufowikekokip.pdf In PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/30090072648.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/bavabalutolu.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/46314732692.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1c2bb002c---vewujeleser.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/wanidaraxi.pdfIn PDF document text
    • https://kiptep.ru/file/58791258390.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109101947099778.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/sowiwu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/39361617220.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/jevodubuxomefus.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0f4b4091a059b3411b8abf4168f737f9/fufonoxafojizodif.pdfIn PDF document text
    • http://teraval.cz/res/file/mabuvotimevutitolulutono.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/rituzaxapenebadif.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210907085855611.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/jejuriniju.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/porefilunesexobumijis.pdfIn PDF document text
    • http://montazenabytkupraha.cz/files/file/susupozevomibusawifuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=booster+cleaner+proPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E5 10328 bytes
SHA-256: 4320b6eb8ac8d455f785aaaddf211cd992442e92c2737fb97cef86e455c01cbf
font_01_sfnt_off0000cf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF63 17148 bytes
SHA-256: f96778d91980b0fb2abcddea9d065a9f50d2b869cd73eca249dd28c50c6150d7
font_02_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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