Malicious PDF — malware analysis report

Static analysis result for SHA-256 741125cd9fe65ea1…

MALICIOUS

PDF

78.5 KB Created: 2021-04-14 17:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ad49e048e75c7e00d7f521c9b0fa57d5 SHA-1: 8e3134810515d9ebf9780361aa62b9bc767ccb7d SHA-256: 741125cd9fe65ea15a34760549c388efcefd050f2b3c4237ead00c01937db3a9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://soxebez.ru/strik?utm_term=four+seasons+preschool+lesson+plans PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475738/normal_5fd1bdce02c4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5fde6a3552137.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/Ohc3jFi/infinity_looper_remote_switch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_600b388febbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_600e09bb3ee89.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/ggSRbBL/zelle_phone_number_deleted.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/JFhiohi/zawejozovezonape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapuduta.rf.gd/2706378416.pdfIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_1b126cfa73fe42d3a8506817ecb8dae3.pdf?index=trueIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_4c3abcdea2e74488bfcb380b7cb1c1e1.pdf?index=trueIn PDF document text
    • http://ribubawomog.epizy.com/mupadejilapumeg.pdfIn PDF document text
    • http://dupikupujetilu.rf.gd/sapurela.pdfIn PDF document text
    • https://3d9856c9-ddaf-40ef-ab37-14107f3d3ee7.filesusr.com/ugd/938106_7f1f014f56c54196bf0d52704dd72a97.pdf?index=trueIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_c283e4c94a53496bbae4fa827361f213.pdf?index=trueIn PDF document text
    • http://wafibajew.epizy.com/wetabokigolegaromeroziv.pdfIn PDF document text
    • http://musizaxodolof.epizy.com/99158973563.pdfIn PDF document text
    • http://nureposo.rf.gd/channa_ve_ghar_aaja_song.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_6ca518d5da644621876ed5c2d35b9b6d.pdf?index=trueIn PDF document text
    • http://nazonuretowu.epizy.com/java_collections_cheat_sheet.pdfIn PDF document text
    • http://wuvejurad.rf.gd/lutemiwuruz.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_faaba7fa86bf4132977482f98956f1e3.pdf?index=trueIn PDF document text
    • http://dagajunodarekon.epizy.com/32115992771.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/math_models_with_applications_answers.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_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 4976 bytes
SHA-256: 5789ace234573abfe69121b68d5cd8f95b2e3afc621244425fa1d6e5f043b803
font_01_sfnt_off0001084d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 10504 bytes
SHA-256: 802dda253ad66db068e11b75540f47877b1e007332083a36ff5c58576d1cd2f6

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