Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed5ad0ea50f45d0…

MALICIOUS

PDF

79.1 KB Created: 2021-02-17 07:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4a63600ae2843f8fa5a487b149e3f3e1 SHA-1: 5aeccad39183c351976dfab7734c774565d7c05f SHA-256: 7ed5ad0ea50f45d0d3aea371a65c4429e3a58531ebdce620492c10be783eacf7
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary lure appears to be search result mimicry, as indicated by the 'ipod mini instructions manual' keyword in one of the extracted URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=ipod+mini+instructions+manual PDF link annotation
    • https://cdn.sqhk.co/zanaforare/hfgcgcv/unmount_external_hard_drive_mac.pdfIn PDF document text
    • https://banukusisazej.weebly.com/uploads/1/3/4/8/134893357/ladunutaw.pdfIn PDF document text
    • http://litazil.22web.org/transparent_concrete_seminar_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/cYJ8fIJ/black_art_wallpaper_hd_for_android.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/weveturipemubav.pdfIn PDF document text
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/vuvisek-vosatanapos-nujojabu.pdfIn PDF document text
    • http://wgathering.org/xagajodufejilw4lr.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/iqahfja/74620476595.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/Riduihf/xinuve.pdfIn PDF document text
    • http://liolika-rsya.ru/30792104474hbd66.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/4ghwjiT/deliw.pdfIn PDF document text
    • http://lnstagram-office.com/galaxy_watch_active_2_blood_pressure_ukjhbq9.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/jhjeigc/maze_runner_book_2_summary.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/332fd04.pdfIn PDF document text
    • https://cdn.sqhk.co/dafagupovo/ZieXHSf/32541955796.pdfIn PDF document text
    • http://antinomi.design/trinomial_factoring_worksheetzr6tv.pdfIn PDF document text
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/degofuvaluxava-bosazubu-divodon.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
    • http://devisufuxuvit.epizy.com/47769044982.pdfIn PDF document text
    • http://dejogamolefip.rf.gd/skill_matrix_template_ppt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 4920 bytes
SHA-256: 3fa88cd48fbf336e0cc0a9b226fd5d52d09f64d6044aae40076f066342407434
font_01_sfnt_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 11112 bytes
SHA-256: 90ee3303b680dff95184a22a2a321eb79c91f9ea46921d48028440edc1ebc74a
font_02_sfnt_off00012156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12156 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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