Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bee8457a0edde1f…

MALICIOUS

PDF

81.0 KB Created: 2021-03-31 09:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ce3eb99e872e9fb16bfa5937eb4fab SHA-1: b88b0bbca4184d0c127fe765ebcd7073c9f1e582 SHA-256: 7bee8457a0edde1fd4cfd81ff37bcba03ba59de7e9109f7924c20d5a282c6a8c
136 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The 'SE_CLICKFIX' heuristic indicates the document likely uses social engineering to prompt the user to execute a command, such as by presenting a fake error message related to monitor resolution. This is consistent with an attempt to bypass macro restrictions and download a second-stage payload from the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://maypoin.ru/wix?keyword=couldn%2527t+switch+to+requested+monitor+resolution+dx11
    • http://nifazafagikoxa.medianewsonline.com/basho_haiku.pdf
    • https://static.s123-cdn-static.com/uploads/4465687/normal_5feb534d59ec7.pdf
    • https://cdn.sqhk.co/fusureviweki/jfgRF44/billie_eilish_merchandise_australia.pdf
    • https://cdn-cms.f-static.net/uploads/4447089/normal_6063fee2c209a.pdf
    • http://japarof.mywebcommunity.org/assessment_strategies_and_practices.pdf
    • http://dalifajebuxog.scienceontheweb.net/27006693145.pdf
    • http://xofelivigavas.mywebcommunity.org/maleic_anhydride_msds.pdf
    • https://cdn.sqhk.co/tofatuxurejo/ch41gjq/sagik.pdf
    • https://cdn.sqhk.co/tiwopaperuv/iEgcgf1/3446685464.pdf
    • https://cdn-cms.f-static.net/uploads/4482869/normal_6055165fa0ead.pdf
    • https://cdn.sqhk.co/diwomijo/jevzgcj/6175470210.pdf
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fc5c6a43d95d.pdf
    • https://static.s123-cdn-static.com/uploads/4451756/normal_5fc88286189a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pupudewasoxo.epizy.com/behavior_modification_principles_and_procedures_6th_edition_free.pdf
    • http://posujozu.epizy.com/tusigezobi.pdf
    • http://bilodevufutumu.rf.gd/menoxuwokitiriroro.pdf
    • http://nekeromufuribel.rf.gd/totevujeb.pdf
    • http://bugenerefajujus.atwebpages.com/lijudapa.pdf
    • http://gupatevefojip.myartsonline.com/sanwa_multitester_yx360trf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e767.bin
efd52040209bb3fcfd4906febe07bfa49e945a4be888a0a66f13ce37d5bc22a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 5244 bytes
font_01_sfnt_off0000f92a.bin
02eaf2f17d4cd5db05c70d7aa2d289aedadad827e2b598b2823f427f72e16fb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 15060 bytes
font_02_sfnt_off0001282a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1282A 4324 bytes

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