Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a503c4fb5a492e…

MALICIOUS

PDF

83.0 KB Created: 2021-04-27 08:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c82e23c44eff55c623a5008cf8fd8a8f SHA-1: 30c6197e0f47eb3c5a30b94ba8c7544b4ec2af89 SHA-256: 98a503c4fb5a492e70e454ddf32cc386d966210d17631b0cf2ea36b3056bbfd3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Trader Joe's fearless flyer subscribe', suggesting a phishing lure. The presence of a high-confidence ML classifier firing and ClamAV detection further supports its malicious nature, likely serving as a phishing document or a downloader for further malicious content.

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://maypoin.ru/strik?utm_term=trader+joe%2527s+fearless+flyer+subscribe PDF link annotation
    • https://cdn.sqhk.co/zoribakim/hgfifjd/ufc_fight_card_live_results.pdfIn PDF document text
    • https://cdn.sqhk.co/rigalazo/hjgeejh/gozimawit.pdfIn PDF document text
    • http://suwufexez.sportsontheweb.net/99886668199.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/pathfinder_monster_feats.pdfIn PDF document text
    • http://remontvorot24.com/kenejofxt40.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/47778076778.pdfIn PDF document text
    • http://amaryllis.space/corpus_christi_offshore_weather_report0h9kz.pdfIn PDF document text
    • http://heretythere.site/bea_miller_song_like_yourv61p.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://kepofif.onlinewebshop.net/odisha_police_physical_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4fdd976-29dc-4d08-bf7e-e6eb876b6461/bopinodomolakog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2caa99d-f159-4087-bca4-d29e1d7665c1/dekosexi.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/airport_express_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/oxford_english_dictionary_apk_pure.pdfIn PDF document text
    • http://zujisofivo.onlinewebshop.net/25504604508.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/warranty_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c0774c-38b8-4a41-8947-0f651909e831/93831539144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6905ad66-031e-4d76-8727-8e852af9b7d5/2010_dodge_journey_sxt_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/61863475775.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/formation_en_alternance_traduit_en_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682a7789-0ddd-4046-ae76-fa6bdb35bc20/loxigotewexafiwetelabejum.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/51237576439.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_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 5012 bytes
SHA-256: 9dde256607e50fc3fa16eb39fce2c51f5c071b3e7a6fadd1b8da487f8c35f2f3
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 11136 bytes
SHA-256: d6c93f9b57c4c290ecf33bb22a66bee6d04be8efb39b3315f5ce17b89734028d
font_02_sfnt_off00013066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13066 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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