Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c065d11b284bf2…

MALICIOUS

PDF

84.5 KB Created: 2021-03-12 06:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 98845a5539627686ca2919f475c36129 SHA-1: e4c83384662c4753c407c527c91808d77859b95c SHA-256: e0c065d11b284bf2da82e8139b1eaa316ed9ef3044c0da8434ef5710864c4e15
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=time+calculator+hours+minutes In PDF document text
    • http://dedotiroviwef.22web.org/prophylaxis_endocarditis_guidelines.pdfIn PDF document text
    • https://diborukokaw.weebly.com/uploads/1/3/0/8/130814192/vuwoxufonanogi_zolekijuve.pdfIn PDF document text
    • http://thecabinets.xyz/cisco_catalyst_3850_configuration_guide20s6m.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/26683649866.pdfIn PDF document text
    • http://getfreecreditreport.info/sears_roebuck_sewing_machine_cabinetvigf1.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/ff98d33.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/8056563.pdfIn PDF document text
    • http://dopenukivo.22web.org/jodazewitowiwixaka.pdfIn PDF document text
    • http://lasleymarkt.ru/bolezazonalopinamufejnl8l.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/gjhhiZ9/battleground_free_fire_survival_unknown_squad_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuniruf/eMZdheK/sowijimelog.pdfIn PDF document text
    • http://smartbright.club/face_mask_pattern_around_head_elasticcay42.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/jjqLjdw/word_party_bedroom_decorations.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/30141198110.pdfIn PDF document text
    • https://cdn.sqhk.co/datagemop/Upidig6/best_free_sound_effects_app_ipad.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/where_can_i_donate_baby_clothes_in_los_angeles.pdfIn PDF document text
    • http://copalofa.site/bogamudetirawexupuh6e8k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sagaxuwesik.epizy.com/77803589286.pdfIn PDF document text
    • http://dujesobu.epizy.com/best_app_to_learn_korean_alphabet.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/10823037312.pdfIn PDF document text
    • http://gefuxexo.epizy.com/kuribizezosuwasutigiw.pdfIn PDF document text
    • http://rezumasalimod.epizy.com/brahmalokam_to_yamalokam_via_bhulokam_movie.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/what_base_do_navy_seals_train_at.pdfIn PDF document text
    • http://sabugafirade.epizy.com/rawuxevowewavopobediwewoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 4988 bytes
SHA-256: e8434bfcd3c93699e1403b96a19fb065566c5718013f16ae23817a7ffb56c308
font_01_sfnt_off00011ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFC 10780 bytes
SHA-256: 80b01336606da8f4057992adabec55c9196cf00741bcc141d4473f94ca6ac34b

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