Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3fee957a2f15db…

MALICIOUS

PDF

67.9 KB Created: 2021-04-05 00:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 315135cd20ee46b1ce96f0afa4a58673 SHA-1: 5363b67ac3324f876c149bb9b082860c1740a7b7 SHA-256: 8c3fee957a2f15db57e55d8bb5e9c41f0543d63f547955557d37768a1ab95899
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to malicious sites. The embedded URL 'https://ponafet.ru/aws?utm_term=coleman+lantern+battery+size' further supports this, indicating an attempt to lure users with a search term. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/aws?utm_term=coleman+lantern+battery+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409811/normal_601a7661e91f7.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/hfTBL0d/23662914052.pdfIn PDF document text
    • http://bluebadge-support.com/latitude_e6410_wifi_driver_windows_7glzhe.pdfIn PDF document text
    • https://cdn.sqhk.co/sotixesikux/etgdpie/79711214314.pdfIn PDF document text
    • https://cdn.sqhk.co/mavixuwaloz/s8iihzm/radio_shack_near_me_bakersfield.pdfIn PDF document text
    • http://azorocheat1.xyz/bokilivizapujunlsdcx.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/fSheuhh/bricknoid_brick_breaker_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_6009cf73bd8c6.pdfIn PDF document text
    • http://damvglaz2.xyz/how_do_you_block_a_number_on_a_zte_flip_phone94fhd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5fe1296b4a3a5.pdfIn PDF document text
    • http://tipografiyav.moscow/run_and_shoot_offense_madden_19it01q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3c73713-be4b-4c8d-a01f-dab92ecb4e1a.filesusr.com/ugd/5df860_22bfe614e1a64c128625c525a23ab707.pdf?index=trueIn PDF document text
    • http://lidiwerefibe.rf.gd/ff_cheat_sheet_2018_ppr.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_c2ed350791c04036ba291ade2e68a02c.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_bcca27ca9426414f9dbb98b62de286e2.pdf?index=trueIn PDF document text
    • http://nevejubusager.rf.gd/excel_chart_template_not_working.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_3d8595067b50485d834dcdb080e0b8bb.pdf?index=trueIn PDF document text
    • https://b09d99c6-da67-4e55-b5b3-baceba093817.filesusr.com/ugd/a69c6c_23cdefa84def44c09d85baecc13650a0.pdf?index=trueIn PDF document text
    • http://xigavekokerir.epizy.com/power_electronics_engineer_salary.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_586af46d434f41b98c0e72480d14f568.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_off0000cc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC48 5028 bytes
SHA-256: 1dbc5a311d94a7c0e068bdea711954589c5cfbd0e3b4edaea656b8c4e3a52e5d
font_01_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 10932 bytes
SHA-256: 568a739019438cbd603b76235b8298d254cd1f309fed0bb5b94ed30b0bd7b2f7

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