Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4948bab5dd24cae…

MALICIOUS

PDF

81.4 KB Created: 2021-04-07 15:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c764e2b2579d94f69d1eba849643e07c SHA-1: ec2de6753ee1d52d975ca22f68f0a1073b2d135f SHA-256: d4948bab5dd24cae1322aff954f07632b3fdad524acc79e4c21a40f87cfd09e5
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('midufefew.ru') that is likely used to host phishing content or distribute further malware. The presence of multiple links on disposable hosting and the use of UTM parameters suggest a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://midufefew.ru/strik?utm_term=parrot+ck3100+user+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/foropogajag/DOgdjg2/24026430806.pdfIn PDF document text
    • https://cdn.sqhk.co/kagitenoru/DJjasMB/kotilebere.pdfIn PDF document text
    • http://lynciguest.com/redukosedagasitujinigiwvxpa.pdfIn PDF document text
    • http://pisodaseveporow.22web.org/21163160853.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/mamepisiludora7w61h.pdfIn PDF document text
    • http://sapazukuwujoji.22web.org/81129029407.pdfIn PDF document text
    • http://blekrossi.ru/danube_cruise_guide_budapestbzw2u.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/MaUw0gj/wallet_uae_cash_back.pdfIn PDF document text
    • https://cdn.sqhk.co/zereseful/ejcOxRh/homeschooling_in_cleveland_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/mojaribi/dhig6hi/gunship_battle_hack_apk_download.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/lojogijotirodf08zm.pdfIn PDF document text
    • http://amst-watch-v2.club/exorcist_stairs_how_many_steps0a68k.pdfIn PDF document text
    • http://tulakijumipad.22web.org/hays_salary_guide_malaysia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisuraregimu.rf.gd/tunnelbear_vpn_unlimited_data_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a73a4f8-aaf4-4620-aa65-6cb49c58ae66/comcast_remote_codes_for_motorola_cable_box_dch70.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4700a973-1889-4591-abfb-a4ca19fb0b3b/93269599322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3eefcc3-660d-4f00-9f2e-8dcc647c7bce/bolizaliwofobikeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16f10ef-598f-4be9-93b6-9fbdfbd1c723/words_of_wisdom_for_new_mums.pdfIn PDF document text
    • http://zaberosem.rf.gd/14405080655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11330ae6-9886-4cf6-a7ba-fe326ec74566/crooked_kingdom_book_series_order.pdfIn PDF document text
    • http://tinasixubu.epizy.com/71430681571.pdfIn PDF document text
    • http://vajavilodufolix.epizy.com/aramaic_english_new_testament.pdfIn 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_off0000feb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB5 5724 bytes
SHA-256: 1d349739a4387820d66ab7b1dbcd4bc7b7d0e2c624ce5c412a92f414f599f1d2
font_01_sfnt_off00011223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11223 11196 bytes
SHA-256: 15788346e4743378300838d14caf3328dcf37b08e2e8ef64fdbc055add3e7478

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