Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69433244a576bf0…

MALICIOUS

PDF

85.8 KB Created: 2021-03-23 18:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0d3f8b3faef44a40418af8816150bfe1 SHA-1: 517d37000a13441faf913ff49a1f633249b0e872 SHA-256: d69433244a576bf033e8e7e8c31afd6a36c4fb3be62a1e3cadc823bb5aa51440
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL leading to a suspicious domain that is likely part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to crafting guides, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://jacksth.ru/123?utm_term=ffxiv+weaver+crafting+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5fe26d6017843.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/cgdhanO/zexikufatolipuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_600f574c4cf74.pdfIn PDF document text
    • https://cdn.sqhk.co/madozozafi/VCidrhg/ziwenapuzimodipofe.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/jijdGbP/44848454742.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/hhTjbhi/man_down_lyrics_shakka.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/daiiy5b/angie_s_list_super_service_award_2016.pdfIn PDF document text
    • http://songkfrk.site/hp_officejet_pro_8615_manual9uuqp.pdfIn PDF document text
    • http://texno3ua.com/469241120732mnr1.pdfIn PDF document text
    • http://normab-id.com/how_do_i_reset_my_brother_printer_tonerykuor.pdfIn PDF document text
    • http://gutprod.xyz/vukexoohztx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471958/normal_604313bf7cc3f.pdfIn PDF document text
    • https://cdn.sqhk.co/zunowexafa/gjhhLgi/bubble_shooter_2020_game_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5fd11a1f41e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_6057a11d09c08.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/faduxodiwo/avg_free_2018_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/suwusakazi.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/financial_variance_analysis_report_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f457f6-ebdc-40e0-92e1-ae836c36c0d6/batazegudevupamemevipem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c857d88b-a473-4280-916b-5e4ec20342df/brady_bmp21-plus_labels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304ee936-2c72-4259-b772-4179a3b80b41/98882175123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727c70e2-5948-47ab-aea5-5b1080df0b94/bleach_cycle_to_clean_washing_machine.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_off00010101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 4924 bytes
SHA-256: 0cfeeb07bf8f7f4458275127fc24ca2f72871ea6055bda31a4b161ed64c824bd
font_01_sfnt_off000111e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E8 12000 bytes
SHA-256: 585fc8b34788f78938d1cb97efebb65c7a759607ae9afe7bc7a085082990e6e0
font_02_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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