Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6dc4d6a483a922…

MALICIOUS

PDF

72.1 KB Created: 2021-03-24 14:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 89a9547c66f24b012baeb9dec813a718 SHA-1: eaa59b2c9496b8d82de30d24a03368d7b7f9e9bc SHA-256: fb6dc4d6a483a9229fe5a2d841b2b2e44a0b45bdfe06a34c54e895dc0154ec2a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links pointing to other PDF documents hosted on disposable domains, a common technique for SEO manipulation or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to lead users to potentially harmful content.

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://baarspo.ru/wix?keyword=king+li+da+nail+drill PDF link annotation
    • https://cdn.sqhk.co/putepirapad/CIggCUk/zumanedi.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/heifhip/nigamurenu.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/jeUpgiz/color_corrector_guide_elf.pdfIn PDF document text
    • https://xomepuwosabagef.weebly.com/uploads/1/3/0/9/130969083/pogovogekuje.pdfIn PDF document text
    • http://dowelatevitik.22web.org/between_the_sheets_store_el_paseo.pdfIn PDF document text
    • https://zadejafiton.weebly.com/uploads/1/3/0/8/130813032/ruworulojivonanud.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/vinalasedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fe290112d4d2.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/eRpP4mr/losiditebemekukafisik.pdfIn PDF document text
    • https://cdn.sqhk.co/waxixojapu/jazgdjg/42976840451.pdfIn PDF document text
    • https://wozexofinudere.weebly.com/uploads/1/3/5/9/135984457/zanujuvifowagurok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_6015ff2f7964d.pdfIn PDF document text
    • http://zeweduzu.iblogger.org/what_is_the_most_mentally_tough_sport.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jevoneloz.epizy.com/euripides_bacchae.pdfIn PDF document text
    • http://xidozine.rf.gd/82973851432.pdfIn PDF document text
    • http://wobalewir.epizy.com/piano_arpeggios_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eddaaba-61c6-42ec-928c-631ec1b41461/selijew.pdfIn PDF document text
    • http://bagabosafeko.epizy.com/80397759647.pdfIn PDF document text
    • http://xakatomefuja.epizy.com/13357099033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269b23ba-98e2-4695-b88e-6cbf00dd86b2/safety_1st_alpha_omega_elite_sophomore_car_seat_installation_video.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_off0000de43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE43 4784 bytes
SHA-256: bcc655a67383c01420f2213ebfccd5c6cfef36a3c7298abf4406df08273f2859
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 10852 bytes
SHA-256: a74a6f3c8a62131ce37beb401a5c4a0f841164aa252b1e7334910f42f6f65093

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