Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b6a4ea133222ff…

MALICIOUS

PDF

63.9 KB Created: 2021-01-22 08:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 449fc34b3562e970ef2938165d18de75 SHA-1: 735b5c2b503a3eb21468dc5a05b0ff11e9adc49c SHA-256: 40b6a4ea133222ff061eae7af3ba294ca7ee4cc503ba5d9439a10f36eff2fd12
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is a phishing or trojan delivery mechanism. It contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting, suggesting an attempt to lead users to harmful websites. The presence of a malicious redirector link and the overall structure as a link farm strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=ducklife+3+evolution+hacked+unblocked In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495254/normal_5ff14b801ec3f.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/digijike.pdfIn PDF document text
    • http://najapizarut.22web.org/technical_analysis_for_dummies_free.pdfIn PDF document text
    • https://site-1178084.mozfiles.com/files/1178084/toca_lab_plants_cheats.pdfIn PDF document text
    • http://torevifij.iblogger.org/android_10_gncellemesi_alacak_telefonlar_huawei.pdfIn PDF document text
    • https://site-1260001.mozfiles.com/files/1260001/ielts_writing_practice_tests_with_answers.pdfIn PDF document text
    • https://site-1177067.mozfiles.com/files/1177067/marble_blast_gold_game_free_online_play.pdfIn PDF document text
    • https://site-1176306.mozfiles.com/files/1176306/7550007716.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/sabiposutaginejuj.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/VagiOhg/glitch_lab_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fd64d0d87913.pdfIn PDF document text
    • https://site-1176958.mozfiles.com/files/1176958/htc_u11_life_android_9_mexico.pdfIn PDF document text
    • https://site-1176609.mozfiles.com/files/1176609/78240359321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxumokuri.epizy.com/31707748414.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD17 5264 bytes
SHA-256: de32e8db68001375f97695ec8c4fe465a92133820259007bad72aadb18a197c0
font_01_sfnt_off0000cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 10660 bytes
SHA-256: 6b3a49e9a24f6b541abf45b31cdb266b3636470d76a6cf64ebfd4ac8b2cbb6ec

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