Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7552e574dad6929…

MALICIOUS

PDF

85.1 KB Created: 2021-04-12 00:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e4fb82b8eeeab250fb07ed45f79af7b0 SHA-1: ce0650a51ecd6c4c8b9defbd664a0112cbd6dce1 SHA-256: c7552e574dad69295b9a4895f0cf28d90e014821d7024d794b80d312e25f895f
146 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. It uses a callback-phone (TOAD) lure. 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 0.9955

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/strik?utm_term=dell+inspiron+17+5000+series+battery+charger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450259/normal_5fdb2b1401d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_606ea2d9f2313.pdfIn PDF document text
    • https://jumewabob.weebly.com/uploads/1/3/0/7/130775497/sisegizotij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_60611c6a6dc4e.pdfIn PDF document text
    • http://godisibipuvam.22web.org/74443624747.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/QiaEHhd/planet_pilkey_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_6047a1f8aff4a.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/8838356.pdfIn PDF document text
    • https://pokumowudo.weebly.com/uploads/1/3/0/7/130740164/8339831.pdfIn PDF document text
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/pepijezafixakolo.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/jaCiiii/agar._io_hack_games.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/hiNhaje/68584278120.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/bJgd6hd/23104418182.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/b6bdb81b76fb090.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/hihehfW/zuzud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c56834-aaea-4cb7-a1d0-d4b34ef383a1/2005_cadillac_cts_ecm_issues.pdfIn PDF document text
    • http://gamadajizi.rf.gd/cripples_bastards_and_broken_things_parents_guide.pdfIn PDF document text
    • http://julisanusifi.rf.gd/play_store_app_old_version_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50e8364-2ccb-46dd-a7da-522284234cf1/04_chrysler_pacifica_water_pump_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3122f444-c554-4a8f-84d6-15d9143ee458/samsung_6500_tv_series_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a635297-feec-47bc-9466-96b15d075179/la_metamorfosis_de_franz_kafka_capitulo_1_resumen.pdfIn PDF document text
    • http://jufalusa.rf.gd/vubupaketetavakugobukonu.pdfIn PDF document text
    • http://wapepot.rf.gd/busqueda_avanzada_en_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2630daf0-7405-47ab-b936-6e0a809c2ff6/what_are_rational_values.pdfIn PDF document text
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_68464c40c6a84c96b31cf86b869f6d2c.pdf?index=trueIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_d133ace6c6ca469e8e859f7a19979202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 3184 bytes
SHA-256: 01101f9626ebe5a37fce6d82377ad8222438d5797051c1e87b6de77c341839f4
font_01_sfnt_off00010c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 5836 bytes
SHA-256: 549ebab19ee186903bf6f2e1181686068c6d306d24291d32128a0f48648231ca
font_02_sfnt_off0001204c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 11068 bytes
SHA-256: 56a1491836a0daf9bcafabaa0b269f1b9bb0ab9b10158f3f024fae2c00b10833