Malicious PDF — malware analysis report

Static analysis result for SHA-256 2221876044e5efa3…

MALICIOUS

PDF

73.3 KB Created: 2021-10-03 13:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6cccc2c51e247982070df715c5a9e732 SHA-1: 5bc474fb38413c5969fe6f2a54937c638f3ba1d0 SHA-256: 2221876044e5efa3351548afcac1870ccebea1a7ba774d540f8ce75b52e16e53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious sites. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=you+will+repent PDF link annotation
    • https://blgjad.com/upload/files/dotilimarufuwogadirojew.pdfIn PDF document text
    • http://medicom.pl/userfiles/file/nufedamukeniw.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/4923398515.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161321d2a449c5---rufinefepusoverijuzorefeg.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/xumamilitowijatabevupo.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/40540085426.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/67830982146.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/vijiwajixodinarenoxozi.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/11375636332.pdfIn PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/21172835473.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/lasinegusetitidixulunebu.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/35613140372.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/2525328942.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/36880398419.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/xawibaluwa.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/sagulijer.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/15027365692.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/6133293107fdb.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/12840757446.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/35267006821.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/86817460222.pdfIn PDF document text
    • http://mobitransjogja.com/files/94633013746.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/91060735484.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_off0000bad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD2 18076 bytes
SHA-256: 35c73d0dc817078f7baac785fdc3388245df920a8b1f276d931684a30e0b9fed
font_01_sfnt_off0000e8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E8 10084 bytes
SHA-256: 4ff6527c07a35b98cd6082d633177d2d6a512fc30f0da76ea2befc85cd194058
font_02_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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