Malicious PDF — malware analysis report

Static analysis result for SHA-256 0902b1c25eb93436…

MALICIOUS

PDF

75.8 KB Created: 2021-09-19 14:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cc1a644dd5f1ca79f0fcc3307247cf03 SHA-1: 34adc410f001063bc0785c7b886170e881445183 SHA-256: 0902b1c25eb9343684ba1ef7a84c7952aca733121d65481c45728ca71d06eba7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a redirector likely leading to a phishing or malware download page. The PDF structure and embedded links suggest it's part of a campaign to lure users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://irlanc.ru/uplcv?utm_term=plants+vs+zombies+2+mod+0+sun PDF link annotation
    • http://www.kymenhome-etsinta.net/tiedostot/files/bopananunidegamumar.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/92464913774.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/jusuratimodunozefoda.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/tojilajes.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/29595817830.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/95932252734.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/lisimuw.pdfIn PDF document text
    • http://balone.net/_upload/file///81596222063.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/pisokafipawupobudu.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/82449466540.pdfIn PDF document text
    • http://modero.vn/upload/files/suwowazuludopamane.pdfIn PDF document text
    • http://gibisch.info/files/files/64168644029.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/79597379555.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/14381834108.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/68806528241.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/42509638850.pdfIn PDF document text
    • http://szwygs.com/upload/13430043072.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6fc2c0cbebbc0686fb640160e6c33821/jiwitis.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/27915061491.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365ebac1c42---denezajuzegujasiv.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_off0000c457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC457 17412 bytes
SHA-256: e29f831bf8ae5de7fbfe154589421e1cb3649467e4453a17dc69e4f804d7b25a
font_01_sfnt_off0000f111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 10916 bytes
SHA-256: 7aa8464e2b78edccd79f635d56725bededf4b8615c34a75c77120e4bd54d9c89

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