Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bce73703e6d703…

MALICIOUS

PDF

76.5 KB Created: 2021-02-16 14:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0f17ccf0e844a1d4921135c7fc9c09f4 SHA-1: a9592c903062010be387521cbbb387442e4d035b SHA-256: 78bce73703e6d70388938d6906d59054871ca429835f0ecfdcea8943652f970e
146 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' further suggests a callback phishing or tech-support scam pattern, aiming to trick users into contacting a fraudulent entity.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/strik?utm_term=gmat+official+guide+2021+pdf+free+download PDF link annotation
    • http://potaberukogox.66ghz.com/classical_music_websites.pdfIn PDF document text
    • http://marafonsport.site/rofugen4lvfs.pdfIn PDF document text
    • https://rekizutor.weebly.com/uploads/1/3/0/9/130969391/koleturazep-mudigaxigexo-panimalufutuvuj.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/7184441.pdfIn PDF document text
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/sixabirirer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_5fdc86f7bf78d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409107/normal_6005ccbea574a.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/dzhjAib/household_chores_in_spanish_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_60143a50c140a.pdfIn PDF document text
    • http://fresh-ita.fun/night_of_the_full_moon_witch_guidezsf51.pdfIn PDF document text
    • https://dikuzimomufadel.weebly.com/uploads/1/3/1/3/131383892/9d7d4d2f9441ea.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/cRhd3jg/sketchbook_draw_and_paint_free_download.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/4561310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450896/normal_60077bafb5dfe.pdfIn PDF document text
    • http://nakenanizugaxit.iblogger.org/manual_testing_vs_automation_testing_quora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanesipub.rf.gd/xekidajepabex.pdfIn PDF document text
    • http://belojegepi.epizy.com/podubifesatularuva.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_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5744 bytes
SHA-256: 1bbf3c998fbf479bce45cdd20cb0b61b6335f8e5cb8ea61a671dac422bd9a355
font_01_sfnt_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 11080 bytes
SHA-256: 0ac90ff834c230f30cbbe7d3ad6f30d5566304e35c6c7e8c7f7613e1f68c9c3f

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