Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7963593c0097655…

MALICIOUS

PDF

70.5 KB Created: 2021-03-31 16:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d27266941ee9f9e09db22b59e98d0b70 SHA-1: 550a07f081ca3bbf6c052030afd03df41da2d247 SHA-256: f7963593c0097655e0b110a9f9fa4f7d9361d6b8e649a28c4d7515ec625e4989
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://zajinet.ru/award?keyword=read+batman+hush+online+free+pdf PDF link annotation
    • http://voiprormul.xyz/kofejavametmyc3y.pdfIn PDF document text
    • http://datingsexchat.site/davupepejexolijl8evk.pdfIn PDF document text
    • http://apparentlyopt.com/aceite_transmision_manual_jetta_a4k4s22.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/uncertainty_principle_definition_economicsxdf2q.pdfIn PDF document text
    • http://keepxufi.space/china_kung_fu_master_picture95p1f.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/kabejofukife-dizaxasom-domagigid-gaxuroluzagiz.pdfIn PDF document text
    • http://winoorama.website/lonagegokanizadakesu8nytu.pdfIn PDF document text
    • http://sikagez.22web.org/activity_1_empathize_with_your_enemy_answers.pdfIn PDF document text
    • http://datinge.site/piston_pump_maintenancedqk35.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/pugiwuwodet.pdfIn PDF document text
    • http://kellys.space/logic_of_english_essentials_vs_all_about_spellingn6b6a.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/hhVNohj/rubber_duck_crossy_road.pdfIn PDF document text
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/3378475.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/sikefopitibikugoswm2p0.pdfIn PDF document text
    • http://masezigo.iblogger.org/how_to_charge_zoom_h1n.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/XVhijge/55019351890.pdfIn PDF document text
    • https://cdn.sqhk.co/furikute/iihdFm1/49031116812.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/lolewukivipanolidewo.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://fiduritunibo.epizy.com/adobe_reader_free_uptodown.pdfIn PDF document text
    • http://zixunoxupisixot.epizy.com/grade_12_technical_mathematics_textbook.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC914 5308 bytes
SHA-256: f09460894bb98b3a1ab7431b013f49492f3c1dca59bad0d98dccbaddc9b14b45
font_01_sfnt_off0000dae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE9 10388 bytes
SHA-256: 1b9a622ba13434ddba1af47ab5fc1701822ad35d9a06dfbf785bb90cee454434
font_02_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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