Malicious PDF — malware analysis report

Static analysis result for SHA-256 852582ceffb00604…

MALICIOUS

PDF

75.2 KB Created: 2021-03-31 04:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0dd8c150cd27554af0158c7485a481b3 SHA-1: fcadd466bfcd8700b3fdf7aa071092c682c5a7ad SHA-256: 852582ceffb00604acad4a0b3b0e05d61a6b438aff1b06abaa500468e208baf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains numerous embedded URLs. The document body, though heavily obfuscated, suggests a lure related to software downloads, specifically 'sketchup 2014 free download 64 bit'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, likely for SEO manipulation or phishing. No scripts were extracted from this sample.

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=sketchup+2014+free+download+64+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401732/normal_60163affdfdf6.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/hfiebv8/62118140734.pdfIn PDF document text
    • http://domavera.ru/54342662604ccawd.pdfIn PDF document text
    • http://litvinenko.xyz/how_do_you_know_when_to_use_binomial_distribution_or_poissonseuni.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/jhhfXz5/best_bingo_number_generator_app.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/brills_express_newspaper_today.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/Xo2gj1o/pukodupomos.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/clinical_examination_of_animals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_60146528750ae.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/gijbiaX/analysis_followers_analysis_for_instagram_premium_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467325/normal_5feb6ed0bfa82.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/Q5Zjals/beach_buggy_racing_on_ps4.pdfIn PDF document text
    • http://secureappeal.com/a_suitable_boy_2020_episode_1r1fum.pdfIn PDF document text
    • http://wedurorokim.mypressonline.com/fovododomimaxapefab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_60494c8463f54.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/sefujus.pdfIn PDF document text
    • http://the-english-temple.com/libros_de_teora_musical_para_principiantesv2p5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/envision_math_grade_6_online_textbook.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/96947742672.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_off0000e6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EC 6032 bytes
SHA-256: ebd18556969190518dbff9abe6013897637e5a5c05aa89f1e60adfd209692b1e
font_01_sfnt_off0000fb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8B 10776 bytes
SHA-256: 28911b6e0adadc900fba6fcd2b1a3545bbef71d2038cc72a4b121ee080e832e5

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