Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f48d803b7d195e…

MALICIOUS

PDF

84.8 KB Created: 2021-03-16 19:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd11f40a137093cd48f5159e0babfb1e SHA-1: 108e723555e9234a2ebee3f230dd6cb40544b1b9 SHA-256: 49f48d803b7d195eca3fb58976e7574e45d9645335d8e7dcc25fa841e6b76c9a
186 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/award?keyword=big+data+analytics+applications+pdf PDF link annotation
    • http://lavka-karamel.ru/704115282952xpx9.pdfIn PDF document text
    • http://axecheat9.xyz/capacity_market_auction_guidelines_2019yy1ge.pdfIn PDF document text
    • http://larts.digital/botikikasawonulogudu6chmw.pdfIn PDF document text
    • http://telemprom.xyz/704502812728tvqi.pdfIn PDF document text
    • http://christmas-gift.ru/satuwipawikusudidukerereg1fan.pdfIn PDF document text
    • http://form-copyrightservices.com/how_to_find_parkour_races_on_gta_5_ps4yof06.pdfIn PDF document text
    • http://copyrightshelpcenter.com/42580264735i2p9q.pdfIn PDF document text
    • http://vorecan.fun/68534888423dfe6n.pdfIn PDF document text
    • http://mignonette.space/31350705488ssyk4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_9e379f7ef3c74a0593a53559ef0283ac.pdf?index=trueIn PDF document text
    • http://xegiseko.epizy.com/alicia_keys_no_one_audiomack.pdfIn PDF document text
    • http://fobexegedun.epizy.com/fourth_grade_worksheets_reading_comprehension.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_a2e5fb44431e45c395da977d238b4140.pdf?index=trueIn PDF document text
    • http://koraxirimaxodet.epizy.com/tell_me_about_yourself_sample_answers_dating.pdfIn PDF document text
    • http://katudajug.epizy.com/neretaketiletupizamib.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_cf1bd352d3934bf698a05af7bde63f03.pdf?index=trueIn PDF document text
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_76f260e92ed54b3782b3f7691a19c5cc.pdf?index=trueIn PDF document text
    • http://divojeniro.epizy.com/memabag.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_13118ae356a4444b990293ee023b517c.pdf?index=trueIn PDF document text
    • http://xumutopefar.rf.gd/civilization_vi_android_apk.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_6a67514e7ba64e82994ac55f281d0aa7.pdf?index=trueIn PDF document text
    • http://rutukoka.epizy.com/57974708256.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_a280e31ecdb14523b08ff5817123bda2.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_4ab1b64db32646a0b0f5a5d618122f93.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 5376 bytes
SHA-256: 72577ae6a4379bb951c4887c0be412085512800a58639ffacc90e232366e62c0
font_01_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 11288 bytes
SHA-256: 5f1967e0ce3d84cd860e5dcfd4afb0aba1eaea91e932aaee4fc23b5a283cff22