Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f070e9bfa693e8…

MALICIOUS

PDF

55.5 KB Created: 2021-09-27 00:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4997e2343a2894af460c698999fda0f8 SHA-1: 36a76248422e0b1596994edd4012d45c39a9713b SHA-256: 25f070e9bfa693e8553cc49003c5071355ca7b80119b1595b320c32f80da49ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, including a screenshot-like appearance and embedded URLs designed to redirect users. The presence of malformed streams and ClamAV detection as Pdf.Phishing.Trojan indicates malicious intent. The numerous embedded URLs, such as https://philabc.ru/uplcv?utm_term=watch+22+jump+street+123 and http://coachhouse.info/assets/file/gewufifepagowaf.pdf, suggest a campaign to distribute further malicious content or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7791

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 55 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://philabc.ru/uplcv?utm_term=watch+22+jump+street+123 PDF link annotation
    • http://coachhouse.info/assets/file/gewufifepagowaf.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/jadere.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/17810135407.pdfIn PDF document text
    • http://xueyuan.zlyxgw.com/uploads/ckeditor/files/20210924005104.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8767eb6147aece779d36f82b381c0e29/kekunet.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/latoturapuguwekowalikug.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/valukajo.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143e99b88275---54258203620.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/motejexe.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/sovidiwufisiragumirumexuw.pdfIn PDF document text
    • https://cicimanis.com/contents/files/96838725318.pdfIn PDF document text
    • https://computerzone.pk/file/95656594919.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/52469316792.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/14181529838.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/bumuzoso.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/diwemoxavolirus.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/jelalokuv.pdfIn PDF document text
    • https://marthomaktrplrdiocese.org/ckfinder/userfiles/files/18228430950.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/30883160892.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210911105439.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/77513209416.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109010544587866.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1