Malicious PDF — malware analysis report

Static analysis result for SHA-256 2752194699537f40…

MALICIOUS

PDF

71.8 KB Created: 2021-09-10 13:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4c3101a1d1d4fd50c725f426082e7a33 SHA-1: 394bb18cf3870a60339cfdf26073bdc42cf2ab18 SHA-256: 2752194699537f405c8e799a756379883940763a66a0875625c843fbf34aa0f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution campaign. The presence of external URI heuristics further supports this, with one URL specifically mentioning 'excel for engineers pdf' as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=excel+for+engineers+pdf PDF link annotation
    • http://zrdb-drogbud.pl/Upload/file/zegoxejoxezi.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/33479860196.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/62921826545.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/67614933210.pdfIn PDF document text
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/lolef.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/zuvoxixu.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/28683070808.pdfIn PDF document text
    • https://soechi.com/userfiles/file/80515128641.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109050205351462.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/44903670870.pdfIn PDF document text
    • http://chinalabware.es/d/files/73731486267.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210907_101545_182.pdfIn PDF document text
    • http://guitarenko.fr/img/files/94161035401.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/37735334527.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/5271332536.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/wobowivininitilag.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613204ede234b---78747123445.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/78773576514.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/68693774865.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/94075026626.pdfIn PDF document text
    • http://superazs.ru/images/news/file/sekotatogusajifoxuto.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/xedomonuku.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/gisinazizefuruganus.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

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_off0000b914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB914 15888 bytes
SHA-256: cff355cd9929cb09c5439cacfbec7e4d62d5cc01f59467d7d30c26a25bcd99e3
font_01_sfnt_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 10620 bytes
SHA-256: 904aebb8e1eccefc02111ec1d90ce92253165360d067857a4bf9f485b083f0b5
font_02_sfnt_off0000f9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.