Malicious PDF — malware analysis report

Static analysis result for SHA-256 df618e71389d3fec…

MALICIOUS

PDF

77.9 KB Created: 2021-03-09 03:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fef2d74cf1c87ecc636c7e51866c460e SHA-1: 391c9971ef610696ece10c124a2561d6c66b0fac SHA-256: df618e71389d3fec10c5ed075cc2c9b2f6da127e24c352cbc30e47b31f9546c8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/123?utm_term=bus+stop+telugu+movie++movierulz PDF link annotation
    • http://bajifepeselok.sportsontheweb.net/to_king_what_is_the_difference_between_just_and_unjust_laws.pdfIn PDF document text
    • http://copyright-rules-help.com/5833490070f6ceh.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/how_long_did_the_depression_last_in_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_6002be9a76407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_6046beab90a79.pdfIn PDF document text
    • http://mangalvpodarok.ru/19767812693fm2yw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_60240c38b7346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_601f01170e173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428062/normal_5fe17f34f28a1.pdfIn PDF document text
    • http://novonet.online/french_pronunciation_guide_ipaxy4q9.pdfIn PDF document text
    • http://monongzhlh.space/font_emojis_and_fonts_keyboard_downloadgbref.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_6011944e0c41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_6022c3063c750.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5ff7810e2fb6a.pdfIn PDF document text
    • http://streamsweets.com/jofevosipbi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408995/normal_5ff8ef76b8bab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuminexozuvino.atwebpages.com/chartered_financial_analyst_salary_in_india.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/12366980721.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_48f1674df2c04cbc87483ba5b5bc2222.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kimone/login_template_android_studio_free.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_901a63c9fe7e49ccb74502501dc1a375.pdf?index=trueIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_958d7009b60246b0950af4131da114cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/21499852065.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/chamma_chamma_video_song_pagalworld._io.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_306ab1142baa477ebdb561051038f177.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_256b4eba74754049acd020d42d81216f.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/should_i_buy_a_house_in_seattle_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/gisaxizonepeduwejo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/57792456180.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_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5088 bytes
SHA-256: d3ea7faf876516abb6f5b61bbb3c6f00820ce63bbf29fd022463377353977b42
font_01_sfnt_off0000fc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC49 15640 bytes
SHA-256: c0705c11854fe2ca7fed74326e0161880e545859fc9a740f13acbcb7c98a9eba