Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b48e48556c0468c…

MALICIOUS

PDF

85.1 KB Created: 2021-03-26 09:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 000081c5f5772bbb3f65b232e6b3132e SHA-1: 614ec598ed438338c41f0d2a9a7c2191b9d57a8d SHA-256: 4b48e48556c0468cd38e450e2734c3ea7ff50811bea8980c5e24785a6d7bbcf0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The embedded URLs suggest a phishing or content-luring scheme, potentially distributing further malware or leading to credential harvesting pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://xezojetit.ru/wix?keyword=bobbi+brown+book+makeup+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/mekaxosur/ijjhbgi/free_woodworking_plans_for_garden_bridge.pdfIn PDF document text
    • https://defupaga.weebly.com/uploads/1/3/2/6/132681490/finosofata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_600a3e6994bee.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/jhmKiiM/ffxiv_weaver_leveling_guide_2019.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/6315796.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/2LhcPq5/skee_ball_plus_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/lhdqqha/blacksmithing_guide_wotlk_3._3._5a.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/gCLgdid/strategic_marketing_plan_excel_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455645/normal_6033d7fa4aae1.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/DTgjiaM/golag.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/eSjjnhg/55775583118.pdfIn PDF document text
    • http://rotixumuzu.22web.org/why_does_my_sanyo_tv_keep_flashing.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/gcl0Mgc/2nd_grade_math_zapzapmath_home_educational_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_603fdab2ef5ac.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/dp9K9hg/wolf_howls_audio.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://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_c0162af62b3f48eeb7584e3689102781.pdf?index=trueIn PDF document text
    • http://binaraw.epizy.com/android_rotate_bitmap_xml.pdfIn PDF document text
    • http://bufixel.rf.gd/34043980440.pdfIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_8a7a190a2c2645fe909bcd1177806729.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_8b375cebc81b4f5b85483f5dd7107340.pdf?index=trueIn PDF document text
    • http://vikarexazoz.rf.gd/historia_del_cristianismo_en_espaa.pdfIn PDF document text
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_d829438ce4a54d36aba87e74f49a910d.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_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 5156 bytes
SHA-256: 13a4d7ec81bc4fd9d98c8f9e14ecbf69a48f118f46e478052300c5f8f18b2ac8
font_01_sfnt_off00011285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11285 11112 bytes
SHA-256: ea7db8387bb85f3640ff520e298f6d9e957285f379bb45303710c74686669123
font_02_sfnt_off0001385b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34