Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15687933e62978d…

MALICIOUS

PDF

70.8 KB Created: 2021-03-19 04:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6ea279128f19cfc627cac7a32b14c3c4 SHA-1: 204a27c39184fcd13a3b9ad8a3f71285193425fd SHA-256: c15687933e62978df1993222d26c26b8ac964d989269b79d8b22be741928218e
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and hosts external URIs, with a critical ClamAV detection for a phishing trojan. The document body, though malformed, suggests a lure related to a 'Harvard business case study'. The embedded URLs point to domains known for hosting malicious content, likely serving as a distribution point for further malicious activity.

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://midufefew.ru/award?keyword=harvard+business+case+study+pdf PDF link annotation
    • http://fovoxarofej.getenjoyment.net/molewisedadovofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fc9a206bdfc2.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/jibiihc/91966993913.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/chhLREf/jurufoneputi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_60304c4961bec.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/tired.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/anova_one_way_and_two_way.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454436/normal_5fe73320a0d7f.pdfIn PDF document text
    • http://orbitan.fun/attendance_tracker_app_freep2667.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/nCGjdja/taps_to_riches_mod_apk_download.pdfIn PDF document text
    • http://adanakebap.org/walmart_ps5_restock_date_and_timexbfgp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_60342897caf27.pdfIn PDF document text
    • http://sevastopol.sale/robesunemiza6fxay.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.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/dowavelaxam/6535843282.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/solution_conduction_heat_transfer_arpaci_free.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/machine_learning_engineer_jobs_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/facebook_cover_template_size_2018.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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 5380 bytes
SHA-256: 0f4bca563ccc44f86b155997e4483f7061a45759f0a05b1babc3be78ed78a3af
font_01_sfnt_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 11108 bytes
SHA-256: 6272921e2b0c5fe1d2de1205b09906fc06a2b2bc99a60f6e156bf0816d283e19

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