Malicious PDF — malware analysis report

Static analysis result for SHA-256 964918f8a797ce6c…

MALICIOUS

PDF

78.4 KB Created: 2021-03-31 02:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 62be06f94961a11391c36e40d0a4e319 SHA-1: 7a1a5295ec0d97bd3998cb577a50ffb9cc7fa13a SHA-256: 964918f8a797ce6cc44bb134a636127675fc73a540078e06653854478f0912f7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://pelibifir.ru/award?keyword=definition+of+economic+development+pdf PDF link annotation
    • http://gekiwejal.scienceontheweb.net/tamil_hindu_baby_boy_names_download.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/vetomarefakokelowufijuteg.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/5th_grade_addition_and_subtraction_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_601937fc41420.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/should_i_turn_off_pilot_light_on_gas_fireplace_in_summer.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/the_tale_of_peter_rabbit_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_6025151182287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490256/normal_5ff9075f0ef25.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/fixabotubij.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/navigation_bar_in_html_and_css.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fc71acfd03ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luselobek.epizy.com/55576650843.pdfIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_89e1275675ea40128743379bb5816b9a.pdf?index=trueIn PDF document text
    • http://damusoborubumo.epizy.com/vobawofelipowufazeze.pdfIn PDF document text
    • http://foduxidepozipiw.myartsonline.com/japanese_candlestick_cheat_sheet.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_82426d68c5e948089864da4cebd2c5dd.pdf?index=trueIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_3e163da6bb384e2b96923628fcb353b8.pdf?index=trueIn PDF document text
    • http://saboveliga.myartsonline.com/198353522.pdfIn PDF document text
    • http://najexenij.onlinewebshop.net/81373454706.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/61528088793.pdfIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_183e60a4615e44e2850730fb8d4aae85.pdf?index=trueIn PDF document text
    • http://jonejarazom.rf.gd/sogedekomupaxuseboxoro.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_9dabee68f8d1485a88eb8e3ec6bee2b6.pdf?index=trueIn 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_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 4876 bytes
SHA-256: 3bda28299dec0976730c508d891ce3fb4620b9ab0233c1c1254d5fc4a3867364
font_01_sfnt_off00010654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 11088 bytes
SHA-256: 071c50d0c5b7deb7b4d6ba04385bcb087d7eab926caa13695b14cc8f34d9446c

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