Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d47248c9710e0ca…

MALICIOUS

PDF

75.4 KB Created: 2021-03-26 09:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 09ab8be307f87bb90aa5e2192e35eb14 SHA-1: 7d647a2eb3d0bccef170f518d9ef5ba69f8f52ae SHA-256: 3d47248c9710e0cab7bdc8c7f422e2eb6816880d6a6d03dc7b0732771a6dc0d3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to link farms or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of URLs like 'https://bologen.ru/wix?keyword=fifa+14+unlocked+apk+1.3.6' indicate a lure for downloading applications. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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://bologen.ru/wix?keyword=fifa+14+unlocked+apk+1.3.6 PDF link annotation
    • https://cdn.sqhk.co/wekaradukuve/fFLgiew/25559531442.pdfIn PDF document text
    • http://gafinobadar.iblogger.org/fuse_voltage_drop_table.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/hh48ihM/ninja_turtles_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/xjigh9n/emergency_veterinary_services_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/Wjgthi8/96131761211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_6004bb0b92758.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/Rgjg5id/mr_love_queen_s_choice_victor_karma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_603c786070030.pdfIn PDF document text
    • http://zefabafiw.22web.org/22583347878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_6030a1fe728b8.pdfIn PDF document text
    • http://silozimerum.iblogger.org/58139213510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_84c1ea5a3a164aea885dd13e2f101d4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a299a2ca-a580-4d2e-8bea-3f22510def24/xunuj.pdfIn PDF document text
    • http://xulalozuvemuve.rf.gd/mikejijivajutedeb.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_0a7157998ae3444fbbeef2ce233eb317.pdf?index=trueIn PDF document text
    • http://gabamad.epizy.com/wotigavewufotezilojuti.pdfIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_88e31a2b7c2b4620aa05b1dd116e59af.pdf?index=trueIn PDF document text
    • http://tarepos.onlinewebshop.net/94186585191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cd12b3-2d9d-4500-89d0-4e81658463b6/alarma_viper_3305v_manual.pdfIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_7cd495f6465f4321bc41a9d83112e9cf.pdf?index=trueIn PDF document text
    • http://sivikonalijuto.myartsonline.com/dell_latitude_e6540_hard_drive_size.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_off0000e7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 5384 bytes
SHA-256: cfac64f2a796e5e1cb4276bc0defd41a0c76b29840b71f6c4907af24193aed7a
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 11240 bytes
SHA-256: 8df69472b5e8bc7e32e85a5c7d971db389fd1ce922047b6a419a81b23ba4b2bf

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