Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80ace438d93b763…

MALICIOUS

PDF

89.1 KB Created: 2021-04-05 04:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b3d40c2e5f4fcf83c9d12e751e8d35 SHA-1: de9e2edf4513f5d70e27796e53117828fa69a4db SHA-256: f80ace438d93b763f871b5fc0509e6adff2aaff24d12dd2677fcfa53ce08e9af
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The primary malicious URL, 'https://jumiwimov.ru/strik?utm_term=how+to+search+songs+on+beat+saber+oculus+quest+2', is presented as a search result, aiming to trick users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+search+songs+on+beat+saber+oculus+quest+2
    • https://cdn.sqhk.co/ponesigis/ifs9Oii/guilty_gear_strive_beta_test.pdf
    • http://pop-marketplace.ru/under_the_dome_season_2_episode_7_watch_online24fl8.pdf
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/jomuxojexon_nogunukamezas.pdf
    • https://mizevazorabij.weebly.com/uploads/1/3/5/3/135347525/xuwopupu_kevipitofuwuv.pdf
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/jonitovoxevuzovoge.pdf
    • https://cdn.sqhk.co/lafugafeniki/Igdwhfa/monizoma.pdf
    • https://cdn.sqhk.co/nogorodizet/eibj1jh/30604485106.pdf
    • https://cdn.sqhk.co/melipetoluf/dZjdjaI/addison_rae_wallpaper_ps4.pdf
    • http://callipakk2.site/52908607039hdvwz.pdf
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/dumax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/13122df9-3333-4fc9-832d-85d1a5507195/jepekumifofepibobag.pdf
    • https://uploads.strikinglycdn.com/files/4deadf0f-3335-444b-82b5-bad59e19fd74/where_is_the_battery_located_in_a_2012_jeep_grand_cherokee_laredo.pdf
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_aca8e18e8b66498b81072f3b13614d10.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81d77785-5dbf-4158-b1f6-2284e95de4c0/garmin_etrex_venture_hc_reset.pdf
    • https://uploads.strikinglycdn.com/files/f64906b9-2f19-4b06-9c6b-df1ecabff990/rheem_tankless_water_heater_energy_guide.pdf
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_7df2154fed1745dfa1692c2a0d55ca28.pdf?index=true
    • https://uploads.strikinglycdn.com/files/de8b40c5-7fba-499c-82cf-969a942db61b/xazemivonukomejixopizetan.pdf
    • https://uploads.strikinglycdn.com/files/f3d699e9-cac9-484a-9b47-d0951308235d/genie_model_7055_wont_open.pdf
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_f656c92caf904d0d804183ccb72dba5c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4ed5a48f-50d7-4c2e-97e8-f6c07cdfbc77/tejuje.pdf
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_f23b978f3ed84130a9b5838129b1caaa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8c524467-bcef-49d7-b892-9d9732acc942/45125663220.pdf
    • https://uploads.strikinglycdn.com/files/a649e1d5-0200-4a99-a1d8-848eadfe1e85/59137428733.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010518.bin
d5be1f33fe5c5b8f8c59a41647d806236e50364e0121b174d6a09edc46642156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 5512 bytes
font_01_sfnt_off000117e0.bin
77f4fa46f6ae30e2374ccda7e75c7f807937e8da2f58434213508048b623b540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117E0 11376 bytes
font_02_sfnt_off00013e8c.bin
eacce040cd7ddbe5bd638eb0b7e4c358aca07d696b0c16e8f14a8bff2cecbd8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8C 16756 bytes

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