Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e01c329c503049…

MALICIOUS

PDF

82.4 KB Created: 2021-09-17 04:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb9f5d7dfe2e8e94016045162e84d3f5 SHA-1: f6122d2eac08315f697f90a4f34ebd9e4b165af0 SHA-256: 46e01c329c503049a752f4dbfac1dccb45d1f8787a05f0cd8d5073621b911f49
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains multiple external links, one of which is a redirector designed to obscure the final destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial scanning. No scripts were extracted, but the presence of numerous URLs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pistant.ru/uplcv?utm_term=goodman+and+gilman+14th+edition+pdf PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399b98cbb16---80993714873.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/pokikevirukad.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/nifisituwogamujitirodu.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/pazobatanit.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/38124229689.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/xajegopefijunonak.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/61069640370.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/jojomodolunopuzizezavozot.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bachviet/20210916/file/guvuxokuseja.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/safiwom.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142ee28ca869---berovawesubum.pdfIn PDF document text
    • https://slide-bearing.com/d/files/vodunokadawif.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/guwed.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/43943010303.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/pibepizakufagidam.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/fobekegozanosazego.pdfIn PDF document text
    • http://nfc.soo.jp/file/91528962286.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/jowiketumejowokasep.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137eda9ce33b---22789239214.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/jefefibupegonifipaxe.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/rugarewekugi.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/33403322495.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/58069100236.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/tixidetek.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/31192979690.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD728 19960 bytes
SHA-256: 249a52bcf58083e8f2b4b442e337908a743b3a04aead2a13625754999ae0c65a
font_01_sfnt_off00010b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001234d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 10848 bytes
SHA-256: a7dda6c314a088ff860b08ebd7c60478bba3a5ed288e77e537b138ac3e916ec1