Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8639b7bd78978a…

MALICIOUS

PDF

81.9 KB Created: 2021-02-27 04:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f2088925b65566c2648d399364360a6 SHA-1: ac50abb3f99074f70a20013dc397769af94983bc SHA-256: df8639b7bd78978a813760044548f16b8e2d09f8d351666551536f337b1bd735
116 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=fiesta+hawaiana+pilar+2020+artistas PDF link annotation
    • https://cdn.sqhk.co/sejejajoxej/b35iajg/27816858134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fdfa16153344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_5ffa49709243a.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/ibpHhcX/62900524325.pdfIn PDF document text
    • http://eglo.club/what_is_the_only_known_wingless_birdx9b19.pdfIn PDF document text
    • http://fb-pageunderreview.com/pc_games_hd_wallpapers_for_androida7sd3.pdfIn PDF document text
    • http://sberbank.services/xulefizitodorimaktp6h0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_600df393e08f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5ffc02a9ad6dc.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/h1Yheha/76366065417.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/bhck6jb/ice_climber_nes_cheat_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_60397b24ac29c.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/idAljhq/blue_book_truck_value_by_vin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5fc9f681b365d.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/iiigiGm/xarikoxonexa.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/bSidpgF/draw_with_me_video_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5ffe880c71731.pdfIn PDF document text
    • http://shtangye.xyz/ssh_public_key_format_authorized_keysb18wv.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/gdiggdP/motor_sims_2_downloads_hair.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 5228 bytes
SHA-256: 48e074ef7eee0941d705d5023436094bcff690d146c2e09c341be2dfc5324225
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 10032 bytes
SHA-256: 8765c408d98aee17c666f7ea386ec609324e270b8ba830417dba9c6e0cc737d6

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