Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2896183df1a831…

MALICIOUS

PDF

68.5 KB Created: 2021-09-27 15:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9fa9aa01df3eafa9c02772fef553d6b2 SHA-1: ae070902bb3031be3fa79af60a5de570b07cf219 SHA-256: db2896183df1a8315f3a1357aee3edfbf2eae6a98faa20f0e5128d16f9faa599
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains numerous links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. One URL, http://konakelektrik.com/userfiles/file/68671720871.pdf, is particularly suspicious due to its structure and hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://konakelektrik.com/userfiles/file/68671720871.pdf In PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1614bef8c6613f---99772179965.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/69438068761.pdfIn PDF document text
    • https://insp.biz/img/file/liged.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sewoxovajoliluji.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/vipexumimupinazekarobalo.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/78365582820.pdfIn PDF document text
    • http://wirheiraten.de/images/file/mutagimobovuwu.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jixurajojupigupenaxak.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/bekisobizisiret.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/59301409602.pdfIn PDF document text
    • http://519pf.com/userfiles/files/83027995725.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/sufajowo.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bc33e3636---dazidivodunulozefu.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/kovijetivotifukebiwed.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210904041730.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/xugamajasizi.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/59320714235.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/77400063196.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3gohclo2r87h1a2esn4rlra6u7/99933654676.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/78412432338.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/76791656968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=android+wear+google+playPDF 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_off0000addc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDC 15420 bytes
SHA-256: abbe861a4397f4d95655b699ff672973bbce0105bd27146e198013de5bddb72c
font_01_sfnt_off0000d50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 10480 bytes
SHA-256: ca795e0539ab9f08fab7ac41e6c64e0856f56ce9be723086411a2e494a0135da