Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03f52dd983d86cd…

MALICIOUS

PDF

74.5 KB Created: 2021-04-07 01:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1c2db1a430d4904d7a63be6fd4e5d2e0 SHA-1: 51aaa401a6ae5421969e8d8b97d34074818b98e1 SHA-256: e03f52dd983d86cda45525fe604ac2905dda351fc1e25752c94324ce4bd58f76
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs further supports the attack pattern of luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/wix?keyword=electron+configuration+coloring+lab+answers PDF link annotation
    • http://nuzarekuzugav.mypressonline.com/amplificateur_non_inverseur.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/28194806385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_60320189e3b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384045/normal_5fce229e62665.pdfIn PDF document text
    • https://lalibirubifo.weebly.com/uploads/1/3/0/8/130873838/4967591.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/theoretical_and_conceptual_framework_in_research_proposal_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_606cd5103e7e0.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/xawosomajoxu_zugonufisub_vawixef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fe9920ab594e.pdfIn PDF document text
    • https://zepaxanodufinek.weebly.com/uploads/1/3/4/4/134455649/8845002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_600bd02c90723.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/european_society_of_hypertension_guidelines_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0236331f-a119-4ec9-8874-175cf02eb26c/jeluwuruwofudibube.pdfIn PDF document text
    • http://notewewagegev.rf.gd/bridal_shower_planning_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/pemidupitegenun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a8bbc9-f799-412a-9503-6b284e8c1dd8/31501656403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc0d544-4251-40ce-9deb-85a8a46fe088/best_air_fuel_ratio_for_power_honda.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/reliable_websites_for_information.pdfIn PDF document text
    • http://rurudowofalav.rf.gd/66954370586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f2cdac-f2b6-488f-b649-a0a39803041b/crossfit_wod_app_iphone.pdfIn PDF document text
    • http://zokazeza.rf.gd/small_in_powerpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d39167b-2fca-4e86-9b3c-d8e36f0a512b/23646766542.pdfIn PDF document text
    • http://bukogog.epizy.com/relisa.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_off0000e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44F 5236 bytes
SHA-256: c8cb1560deac84c983bce7eaf0f1ba63059888ab8029d4e9188c31ec1e34ab6c
font_01_sfnt_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 10720 bytes
SHA-256: 32c5e302870c89e53fb05ef3b792d044defb86731dfaa905b4f2341edc868f57