Malicious PDF — malware analysis report

Static analysis result for SHA-256 5446760d513a4faf…

MALICIOUS

PDF

78.9 KB Created: 2021-04-01 17:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f293fbe769ecdc95bdb616dd26a9c7a SHA-1: 0df9f69ca6bae1f6bac479122723567513b02ded SHA-256: 5446760d513a4faf4c14e110cf5f8df8710d0a482ee4a43a55bf75d22e0c1cb0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous external URIs, with one prominent URL suggesting a lure related to wealth transfer and taxes. The document body, though heavily obfuscated, appears to contain metadata related to its creation, further supporting its nature as a potentially malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=how+to+transfer+wealth+without+paying+taxes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530323/normal_60323bf7020e5.pdfIn PDF document text
    • https://tupakebu.weebly.com/uploads/1/3/5/3/135308645/9120818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_5fe9c16cce865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5fde5cc31f7fe.pdfIn PDF document text
    • https://nililekekikare.weebly.com/uploads/1/3/0/7/130739967/368769.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/wukukanikabaxofaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ff35f55948d6.pdfIn PDF document text
    • http://mupulopi.22web.org/paxivumusunalibof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385207/normal_5ffc01db755d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xupopav.epizy.com/womegomigiwetaferik.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/botesasakadonexemetok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd86433-2c17-4479-9e58-7d5bff86d278/ginefenesaxup.pdfIn PDF document text
    • http://wavujeg.epizy.com/social_category_meaning_in_form.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/times_tables_practice_worksheets_ks2.pdfIn PDF document text
    • http://bavixefavidevok.epizy.com/94454213598.pdfIn PDF document text
    • http://jenilonadal.rf.gd/6968864244.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/viwikuxesuvim.pdfIn PDF document text
    • http://vegobojogaroju.rf.gd/brother_dcp-7065dn_toner_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/wakamigoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/299130e5-ddc1-4d67-86f4-a3de3360b241/lanemogigovaju.pdfIn PDF document text
    • http://fegarezitima.rf.gd/great_stellated_dodecahedron_template.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_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 5384 bytes
SHA-256: 5e3dbe3edcb8e320ab03a5eb2ce55d2597f21f414c2e835f4eca226d61910473
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 11436 bytes
SHA-256: 8be64b70cbac9db266b96ee8fa72479be838040da81e86019b3bdcc909946f51

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