Malicious PDF — malware analysis report

Static analysis result for SHA-256 205643337e189589…

MALICIOUS

PDF

77.4 KB Created: 2021-04-01 19:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c28bb38ed233a603913d8b5c8c569a8 SHA-1: 9ddbd53171dcb4d2265a724d29666de3def714d5 SHA-256: 205643337e18958952ccee6746976a0685a7b65dca0d39c4e403e96f59871caf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly 'https://botokaw.ru/strik?utm_term=how+to+clean+baby+jumper', suggest a phishing or SEO spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=how+to+clean+baby+jumper
    • http://shmelev.pro/what_is_the_best_tracfone_to_purchaselnymv.pdf
    • https://cdn.sqhk.co/piravasufinu/gj0jdig/89243554456.pdf
    • https://cdn.sqhk.co/kasavakujosi/hhBjbgi/xikovomurodarimewa.pdf
    • https://cdn.sqhk.co/vitimosugu/beZPgib/octopus_vs_squid_tentacles.pdf
    • http://oficialshoes.site/bhagavad_gita_chapter_2_verse_47_in_hindinb6lx.pdf
    • http://qrastenmap.online/free_esl_english_classes_for_adults_near_meutc30.pdf
    • http://samettemiz.xyz/instagram_apk_2018_julio5sxoy.pdf
    • http://form-lnstagramverificationbadge.com/scag_zero_turn_mowers_for_sale_australiaccwav.pdf
    • https://cdn.sqhk.co/vefemenivu/fidieic/96904270043.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6208f4f1-07e5-4f51-a6b2-5df18a3bb7c7/29452178257.pdf
    • https://uploads.strikinglycdn.com/files/b7ed56ec-41d4-4101-9bfe-31f57f6e2753/19863918136.pdf
    • https://uploads.strikinglycdn.com/files/8acb7168-936d-42d5-8db4-603ff1aeed79/gagugam.pdf
    • https://uploads.strikinglycdn.com/files/4cce3fb3-4e21-4a2e-b3af-c0446a67424a/zte_3g_mobile_hotspot_password.pdf
    • https://uploads.strikinglycdn.com/files/68e39a6e-1329-4fd1-b955-932bf3a6d990/66056315491.pdf
    • https://uploads.strikinglycdn.com/files/6f1c1efa-903e-46fd-b43c-22eca0af220f/dragon_ball_z_manga_volume_26.pdf
    • https://uploads.strikinglycdn.com/files/a02d56e7-d739-419b-a20a-11532e56d172/why_wont_my_toro_push_lawn_mower_start.pdf
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_d243cac4e8af4303b5394fe77717c2a0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/308fef9d-6215-475d-ba7e-4a3822c28b16/virojatufu.pdf
    • https://uploads.strikinglycdn.com/files/16782674-846d-4b8a-bccb-5e5648c691a4/68986696640.pdf
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_da273836e811464fb436573a56e32538.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ee2cf587-0dc6-4018-b0ba-beba09ebc6bf/will_genie_intellicode_work_with_liftmaster.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06f.bin
c49ef3dbb0ec5084f409a0c3b367677534b5acb73f142fa727c40bd46837a638		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 5272 bytes
font_01_sfnt_off0001025f.bin
df6dc9054a15c1c72f59ba415ea1262c25abfe8f81eacc4dce71bfcddb03fed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 10640 bytes

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