Malicious PDF — malware analysis report

Static analysis result for SHA-256 f123b20b7257feef…

MALICIOUS

PDF

80.5 KB Created: 2021-04-19 04:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d618baeb7eca3fe29d59a40c36db8e9e SHA-1: 77fd44aa8cc32a1c403f2273fc185197775b08c2 SHA-256: f123b20b7257feef837d149e057aa33b661d3a505a8a85176846a255bc648de3
96 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, containing numerous embedded URLs. One of the primary URLs, 'https://jumiwimov.ru/strik?utm_term=sub+zero+650%252F0+manual', appears to be the intended destination for the lure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=sub+zero+650%252F0+manual
    • http://mimudobaros.22web.org/girl_interrupted_full_movie_summary.pdf
    • http://pusewuvi.medianewsonline.com/classification_of_algae_by_lee_2020.pdf
    • http://vuletotam.scienceontheweb.net/banach_space.pdf
    • https://cdn.sqhk.co/xexerekija/jedG6jh/11682783609.pdf
    • https://zurufapejol.weebly.com/uploads/1/3/0/7/130739524/ccaecc52de9aceb.pdf
    • http://nokojatagi.mywebcommunity.org/93483078036.pdf
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/rafeniwunerimuvaril.pdf
    • http://funokeronox.iblogger.org/rusepudeg.pdf
    • http://xebupado.mypressonline.com/craftsman_yt_3000_46_inch_deck_belt.pdf
    • http://popibiku.22web.org/belton_isd_calendar.pdf
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdf
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/335929a44.pdf
    • http://jolixasij.sportsontheweb.net/fasofoxigatafis.pdf
    • https://cdn.sqhk.co/mafokesaxuvi/geZjbib/19760158774.pdf
    • https://cdn.sqhk.co/dobajinorite/igeifYk/12926482448.pdf
    • https://cdn.sqhk.co/sixitigoxeto/4hjhj9H/hueys_menu_winchester.pdf
    • http://pewawivir.iblogger.org/rulogufisose.pdf
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/votenibilo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_9e5e38d0b6e142f39c31d401e6e32ace.pdf?index=true
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_7789a5cdd88147da9998037ecac55403.pdf?index=true
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_1f03f57cc920462e9575a6e1ac8b0227.pdf?index=true
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_c755c309f9c54b8a9a4caabe0362f76a.pdf?index=true
    • http://bapiwixobenilax.rf.gd/tratamiento_hernia_diafragmatica_congenita.pdf
    • http://lavuradisaxel.epizy.com/vumanosudulafo.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_off0000efad.bin
5d7cc6866e3809f19e5f3bd45b0778d90485728101daba9cfe6f7b1c310753b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 5156 bytes
font_01_sfnt_off00010118.bin
3c33d97e95285bef1ae20ec1e1b23252234e83746bdf33f3aee90a318341dadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 10524 bytes
font_02_sfnt_off00012543.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 4324 bytes

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