Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d1f9b4dd576dbe…

MALICIOUS

PDF

107.8 KB Created: 2021-02-15 19:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35c9b608c4c87a199664452c55cbe021 SHA-1: 169a1123d4a2dc4eb6bbca5f2091b3a0710fdbb7 SHA-256: f9d1f9b4dd576dbee8c2a879291c6f6a1c97afd00b19ff321e1698e2ada3f869
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it contains malicious content. It functions as a link farm, embedding numerous external URLs, with a significant number hosted on disposable domains. The presence of a URL with a 'utm_term' parameter suggests a potential phishing or scam lure, aiming to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=what+is+progressivism+in+teaching PDF link annotation
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/05c9e39a.pdfIn PDF document text
    • https://baxakazakibabim.weebly.com/uploads/1/3/4/5/134585713/5890032.pdfIn PDF document text
    • http://axecheat8.xyz/clash_of_clans_th8_war_base_copy8y3vv.pdfIn PDF document text
    • http://texno3ua.com/reference_point_software_freej4adp.pdfIn PDF document text
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/dudizisakuwige_repesarigina_soxazaneteke_tesilo.pdfIn PDF document text
    • http://wekeb.space/posoxw215v.pdfIn PDF document text
    • http://verification-help.business/caldera_peisa_duo_f_manual_de_instrucciones0k6gv.pdfIn PDF document text
    • http://vkysnaya-eda.site/nbc_sports_tv_schedule_horse_racing283zv.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/mhbjjif/tamemalepudipanepu.pdfIn PDF document text
    • http://itdomen.fun/dulegaga97owd.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/737263.pdfIn PDF document text
    • https://vezerovir.weebly.com/uploads/1/3/4/5/134580053/8845039.pdfIn PDF document text
    • http://masito.space/xarefawafotuludal5v94.pdfIn PDF document text
    • http://goodshopsales.xyz/libarusexoketomiwunir2uz44.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/1790018.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/datama-xofijomutetesej.pdfIn PDF document text
    • http://airbin.top/72689544583brue6.pdfIn PDF document text
    • https://jiwepeduvebata.weebly.com/uploads/1/3/1/4/131456267/wukegexu_xemolowepusis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/simple_harmonic_motion_lab_report_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/2015_arizona_cardinals_injury_report.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_off00016763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16763 5388 bytes
SHA-256: d4f853bf0289be209c38a51bd0ee50799a5cc17f30eff84e30eda7f195f3854e
font_01_sfnt_off000179a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179A2 12400 bytes
SHA-256: d72d68ee268cad7677e08a6209837895598b58d0eeb6831609bdfa324131dd5f

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