Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c8e79beb741e3b…

MALICIOUS

PDF

80.7 KB Created: 2021-04-08 00:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c433bd728ddad421f620ec0ef0e3850 SHA-1: e16a68ae442859636e1ff57799cd158802961374 SHA-256: e0c8e79beb741e3b901d9438a7f5885fdd45ce73583512f5a9276e814ef0f6fa
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 0.9998

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://jumiwimov.ru/strik?utm_term=is+court+open+to+the+public PDF link annotation
    • https://cdn.sqhk.co/fovipobex/2wMEgji/vr_e_voce_cadastro.pdfIn PDF document text
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/dopozap_furemekuxupagi_gumifevukunipu.pdfIn PDF document text
    • https://nomiviweran.weebly.com/uploads/1/3/1/0/131070579/jadowolig-weridijifol-mujuxolot.pdfIn PDF document text
    • http://edalovert.xyz/96562889979chehe.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/eheihfh/indoor_skydiving_las_vegas_coupon.pdfIn PDF document text
    • http://trastqort.online/why_is_projection_important_in_dramajjgp6.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/37698125661.pdfIn PDF document text
    • http://moresukko.ru/what_kind_of_character_is_the_nurse_in_romeo_and_julietip50d.pdfIn PDF document text
    • http://studytogether.fun/55279468477qjx62.pdfIn PDF document text
    • https://cdn.sqhk.co/xivudebisov/jgiieij/zagemonopavonoworujaf.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/runuzitexokol/usc_workday_timesheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f17f71a-9d9c-4791-b2c2-9d4d534ea66f/pofirujekokejaremex.pdfIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/ielts_academic_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/jufato.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/jasitato.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/javerikeg.pdfIn PDF document text
    • http://wepikupovug.myartsonline.com/61283942135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17e711c-5971-4895-819d-73a93b3d0350/77609653449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6746da57-42e0-441d-b01d-3c688533697e/kodisadoxomubegorive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd4e698-55ec-4b93-9e17-7fca6e5d930b/how_to_delivering_your_speech.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_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 4888 bytes
SHA-256: e73a67abc59b824c70b1652230b7fb4cc8c17b1ce18efe9f06043c21df494203
font_01_sfnt_off00011004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 10616 bytes
SHA-256: 4e8e635f48116999436dced91d37f467306524c090bdd58d5e30011f7e1d6a27

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