Malicious PDF — malware analysis report

Static analysis result for SHA-256 70700db56bd4364e…

MALICIOUS

PDF

80.4 KB Created: 2021-05-01 23:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3170cea8947816018091be97c8601a9 SHA-1: e6eaece7a588105d8516fa5da3de4392c756537c SHA-256: 70700db56bd4364e653c463a808fbfd6a0c727396ce73ccfce1beda06b5cf1a0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The primary malicious URLs identified are 'https://pelibifir.ru/strik' and 'http://prizinsta.online/nozetarogizutikuxinadep7nus.pdf', which are likely used to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=islamic+dream+interpretation+baby+elephant
    • http://prizinsta.online/nozetarogizutikuxinadep7nus.pdf
    • https://cdn-cms.f-static.net/uploads/4451225/normal_605c4f778576c.pdf
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/xufadu-dulafigeda-fafebivuweluk.pdf
    • https://cdn-cms.f-static.net/uploads/4476780/normal_600e5d0d79735.pdf
    • https://kutinimi.weebly.com/uploads/1/3/4/6/134608846/8458793.pdf
    • http://yogist.fun/tripadvisor_bungle_bungle_guided_toursqwht2.pdf
    • https://cdn-cms.f-static.net/uploads/4463785/normal_6061a3d5a90de.pdf
    • http://xewopixomimam.22web.org/atlas_de_microbiologia_clinica.pdf
    • https://vuxomikegivu.weebly.com/uploads/1/3/1/4/131453843/6405366.pdf
    • https://cdn-cms.f-static.net/uploads/4483354/normal_60656ecf6a016.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d245d9d4-43de-45ee-be02-852f9176337c/fufunodokano.pdf
    • https://uploads.strikinglycdn.com/files/b7debfb2-8cb7-47e4-b95a-ee8bfbf764fc/kitchenaid_pro_600_series_lift-bowl_stand_mixer_-_6_qt_-_575-watt_-_silver.pdf
    • https://uploads.strikinglycdn.com/files/6b23260e-880c-46e3-b46e-b8f03779268a/plantilla_plan_de_negocios_ejemplo_word.pdf
    • https://uploads.strikinglycdn.com/files/7735a11f-331c-4045-a72f-addb0fcea62f/jazakinokuvipefobosa.pdf
    • https://uploads.strikinglycdn.com/files/ef4ad29c-8320-47df-aae8-0004db10a3dc/how_long_does_fish_oil_stay_in_the_body.pdf
    • https://uploads.strikinglycdn.com/files/73f48ec3-aed5-441f-a538-0f0c50a261dc/91794048606.pdf
    • https://uploads.strikinglycdn.com/files/de345d13-b396-41a4-b189-56169d6d8e1e/what_is_jimmy_pattison_net_worth.pdf
    • http://dupavumomupu.epizy.com/34744472679.pdf
    • https://uploads.strikinglycdn.com/files/cbaf81ca-cc67-4d68-b602-6c0ba97ae5e3/1147162736.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbab.bin
ba9cbf7d46efd7c65b3de791caa881a2e85eccc67b7c2b281cb87481a2733245		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 5492 bytes
font_01_sfnt_off00010e2a.bin
d1f8106045e85789fbae63ca208413fe55b3c2ace356bd4db6caeb4e686f58ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 11288 bytes

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