Malicious PDF — malware analysis report

Static analysis result for SHA-256 43681411d7e50e2b…

MALICIOUS

PDF

73.9 KB Created: 2021-02-23 07:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5ba86cc5a50a164897392bfca0d748e5 SHA-1: 4a125478689448daf7eddb10ee656cfc0eb3d1cc SHA-256: 43681411d7e50e2b0078b0f4d566ece2fd30ea9a84d2ba52d32dc8d10b21d125
126 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous external URIs, many of which point to disposable hosting or redirectors, suggesting an attempt to direct users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to 'portable washer' setup, which is likely a pretext to disguise the malicious intent of the embedded links.

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://seumenha.ru/strik?utm_term=how+to+hook+up+portable+washer PDF link annotation
    • https://vukojudal.weebly.com/uploads/1/3/5/3/135317211/belazoderunezunewex.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/sociolinguistics_janet_holmes.pdfIn PDF document text
    • http://sentytld.online/towagumukitojizuruwarinezoevio.pdfIn PDF document text
    • http://aycotoro0.xyz/mr_heater_big_maxx_mhu75ng_partssv4bd.pdfIn PDF document text
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/tupamuliposomimosa.pdfIn PDF document text
    • https://pimidunobesuxig.weebly.com/uploads/1/3/0/9/130970022/gasemure.pdfIn PDF document text
    • http://reform-st.ru/dajoraxodsl8vo.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/2371084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wamodaf.epizy.com/varimewozogaxekirapikufil.pdfIn PDF document text
    • http://bidasumibave.epizy.com/relation_between_particle_physics_and_quantum_field_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/7023227938.pdfIn PDF document text
    • http://jizagedades.rf.gd/daxifaduzusewabefapadu.pdfIn PDF document text
    • http://zubixuguse.epizy.com/tesco_pet_insurance_claim_form_tracker.pdfIn PDF document text
    • http://mimegovo.epizy.com/windows_10_setup_tool_32_bit.pdfIn PDF document text
    • http://gexegufikide.epizy.com/74752192131.pdfIn PDF document text
    • http://bowudizukeb.epizy.com/kibanezigusexosenap.pdfIn PDF document text
    • http://bidetorula.rf.gd/gukexazazepek.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50C 5164 bytes
SHA-256: 68eb8bbbd6b8062d29f82dcd0c2a68c800bd4d1be9667898687a6905343bf122
font_01_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 10644 bytes
SHA-256: b642edd4c706de776bf5bc6578ceddd768e24b3251b48fb7f61b1666680853c9

Open this report in the interactive analyzer, or submit your own file for analysis.