Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ddb6df9b547c5a…

MALICIOUS

PDF

82.6 KB Created: 2021-03-17 05:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4026de03d1267ada52377384883114d1 SHA-1: d9766873632cc83a55dcb126efc87f428b7c156a SHA-256: 82ddb6df9b547c5a221176d7ce9d5a49a0f69e9291484d8ca780bd6737dc0854
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=pokemon+hack+apk+gba PDF link annotation
    • https://cdn.sqhk.co/tikatonasa/chjBhhM/dr._david_soulsby_chestnut_street_south_charleston_wv.pdfIn PDF document text
    • https://cdn.sqhk.co/jalixuwefes/Y8QjewD/whatsapp_free_for_nokia_lumia.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/cJgewjc/game_of_thrones_ringtones_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/geruvijiwiw/Rfzggq1/allegiant_customer_service_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/gepelarawazu/dCL7jji/find_friends_not_working_on_iphone_8_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/guzamuvi/a11iffM/angular_4_interview_questions_for_experienced.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/iauHTgi/daily_mail_deals_and_steals.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/afJrrgj/archery_trick_shots_lars_andersen.pdfIn PDF document text
    • http://flowerport.store/31333024601j96a3.pdfIn PDF document text
    • https://cdn.sqhk.co/weralutofa/Q5hiWhh/95575137867.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/917711311882mzf.pdfIn PDF document text
    • http://vigastlens.xyz/seed_funding_pitch_deck_template5x96n.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/hgid2if/.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/busutafitufe/bein_connect_mena_apk.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_0c8ea21218bc4f0ab996854a5d04d64d.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_3e50c0d2153d463aa1cd1a9f189d6bba.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_c67beff7a26c462d8cacad04f7bf418d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/kakigiluvemaromej.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/raboza.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_4de29de9f7874815973060081bb3a8bb.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_6f44c795989a472fbce6f2e6f844d6fa.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C8 4908 bytes
SHA-256: 1524a34102ffd8771738a2d1c466471ad08d7fa9af4ea676b074834619fb8529
font_01_sfnt_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 12292 bytes
SHA-256: 066713067d580807723f56822b7a090197d68f7b84e34a2c4843b2cb549363b3
font_02_sfnt_off00012ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176