Malicious PDF — malware analysis report

Static analysis result for SHA-256 9770c3c3b1d031f4…

MALICIOUS

PDF

74.3 KB Created: 2021-05-11 00:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86bf94386aad7abdcc9bb16e12000109 SHA-1: 76292c60eb50ff3cf584d55f842b81efa03ea120 SHA-256: 9770c3c3b1d031f4feb39b75c2e56ace8d81eda0a3c36ea6eeabdef51873b5d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, pointing to domains like xajibur.ru and xeeewq.xyz. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document body, though partially corrupted, suggests a lure related to 'Stealth cam sd card reader for ios devices', likely a pretext to drive traffic to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/strik?utm_term=stealth+cam+sd+card+reader+for+ios+devices
    • http://xeeewq.xyz/how_to_connect_aquos_sharp_tv_remoteykqi3.pdf
    • https://wajigigo.weebly.com/uploads/1/3/4/5/134588105/6547273bf35.pdf
    • https://cdn.sqhk.co/xolafunodo/HogcEjj/homemade_burger_recipe_no_egg.pdf
    • http://gsmall.space/11058248289zdiq7.pdf
    • https://cdn.sqhk.co/melukate/f1dibjd/sushi_boat_catering_menu.pdf
    • http://pixxel.life/windwalker_monk_dual_wield_or_2h_shadowlands0m6dj.pdf
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/8794196.pdf
    • http://wonder-ita.space/9698604283369e87.pdf
    • http://devgm.design/2019_calendar_template_south_australiaag20k.pdf
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/d7f217eee.pdf
    • https://cdn.sqhk.co/zinazejoras/jexfhiO/kpop_usa_phone_number.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_ef3a249d674b424c8479b54fddd6182d.pdf?index=true
    • https://s3.amazonaws.com/wupiwupiwot/mi_a2_lite_android_one_pie.pdf
    • https://s3.amazonaws.com/jedadokuti/chitra_vichitra_bhajan_mr_jatt.pdf
    • https://uploads.strikinglycdn.com/files/39677e9d-8e4b-4bde-93a3-4ed6aefc021c/sta_rite_cristal_flo_sand_filter_parts.pdf
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_b8e63318926c4e65a6001d8b7ba72601.pdf?index=true
    • https://s3.amazonaws.com/kujapomib/long_island_hourly_weather_report.pdf
    • https://uploads.strikinglycdn.com/files/64d24348-33ce-463b-9201-d80999891b17/falomisu.pdf
    • https://s3.amazonaws.com/dazifozixawus/how_do_you_put_on_a_omron_blood_pressure_cuff.pdf
    • https://s3.amazonaws.com/fujadabez/halifax_guaranteed_investment_plan_fund_fact_sheet.pdf
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_d14d0518d4524e5083dc56817a1a59f8.pdf?index=true
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_3b05106ababb456d93f44e486c1aceab.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c96809e0-bfb3-496f-aa91-11f1c43fa7c0/lewogesanikoxivitapi.pdf
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_5c33c3bfbade44ceb898fe60506b9641.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32b.bin
97575d8e7c5834381d97e4e9c8ffeadc80d0040d7a7900f7dc6d2bc13dda1cb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 5424 bytes
font_01_sfnt_off0000f577.bin
3098b3ec67d1dab4b16639cc8d2c88cfb36a68d3b9033715f28873028e60f309		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 11164 bytes

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