Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d7f1504e619f48…

MALICIOUS

PDF

81.0 KB Created: 2021-04-26 07:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5d8c9a11725038146e15a7af5e155292 SHA-1: 170073895bb12c3e380c26c265414a2784b98bf8 SHA-256: 76d7f1504e619f48abecc53f2c5088d492b10a28f8d7f89a0382213bce575db6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a deceptive link structure. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML detection strongly suggest a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=letter+from+birmingham+jail+analysis+2+quizlet PDF link annotation
    • https://cdn.sqhk.co/mozulunilex/jdgeVjj/presidential_dictatorial_powers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_600ed87aaaef8.pdfIn PDF document text
    • http://creampiepow.club/blackmagic_atem_television_studio_hd_setup15gve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_602167c6d8c1c.pdfIn PDF document text
    • http://gnoogle.site/google_maps_street_view_not_working_2019usrpc.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/bEZdXNe/14510296438.pdfIn PDF document text
    • http://reduslim-italia.website/emulator_dsi_android8cfua.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/HgcjjPU/facebook_messenger_android_apk_old_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_6051e82fb2e92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_602e2862de617.pdfIn PDF document text
    • https://cdn.sqhk.co/nesunarimu/6TheDLP/alarm_button_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_601daa6cb2e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/hojhgil/laraxawapazarumiverumam.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/f2hjex2/74997002489.pdfIn PDF document text
    • http://netekigupi.22web.org/80947236826.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuzodopuvu/gifhtgi/kunipofup.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/jigezilor/kuvupivonebowogikefufad.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/69862353495.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/rakaledibedejopudix.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/54775095586.pdfIn PDF document text
    • http://zegemipufe.epizy.com/armaflex_foam_sheet_insulation.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_off0000fd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 5748 bytes
SHA-256: e32baa5dfd5089bfeccfd77780372d1673248fb9a5d347cd6b896ae05d9fecbc
font_01_sfnt_off000110e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E9 11036 bytes
SHA-256: 5134ad7ff04749b60d4fc42cc7495473aa2514e8056b8d11fee855cdb6cd6355

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