Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5c12cfe26a5ab7…

MALICIOUS

PDF

81.6 KB Created: 2021-10-07 00:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a24b9a89731b5ef9ebb06d538ab23c01 SHA-1: b37e79751de3a90ac25a8b527009aff14e7f7dc6 SHA-256: 3e5c12cfe26a5ab7e711f1e1cd33fc08c3c9267f6b0d1876118ca077b344b524
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous other PDF files hosted on various domains. While no scripts were explicitly extracted, the nature of PDF exploits often involves embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://baozhaopharma.com/upload/files/pozinuzenoturedomigel.pdf In PDF document text
    • http://tylincms.com/userfiles/files/40725414066.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161335a195a43a---22303926264.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/54276638517.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/noropujugor.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/zisefozak.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/xinejesonamelikuvutejew.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/45698570982.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210903_6456F093E4364AF2.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/79438849569.pdfIn PDF document text
    • https://gulamanis.com/contents/files/nebopegosuzotag.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/45891241836.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/kevanekunokoj.pdfIn PDF document text
    • https://friendsofmultisport.com/ckfinder/userfiles/files/5293877153.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16335540481739066848.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/finokokeborubugunepemigi.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/50728965395.pdfIn PDF document text
    • http://fxlcd.com/upload/file/xodozajowenunusi.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/wiwizaworinegiwigexop.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/23250366864.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/61363316052.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/42132609784.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/32786316868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=itil+complementary+guidancePDF 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_off0000d73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 10856 bytes
SHA-256: 9f10778c470fda13939ee7f15aff5c2c0218373e3c67ae2ce8a81e6a3d136e9c
font_01_sfnt_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 18876 bytes
SHA-256: 1e4c15e7f17e2be35d5064aaf7b07ae5bf4554cc182c3406b77245bc53ef7e57
font_02_sfnt_off000120d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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