Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b3c24b0e9d40c3…

MALICIOUS

PDF

78.7 KB Created: 2021-06-10 05:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 82acc76f50c5974068503e1d61fed523 SHA-1: 04396f438666879e6e830da635378df305dc82e9 SHA-256: 44b3c24b0e9d40c35340332da870fde0cce86986446333537f4755c9d8af8f95
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous external links, one of which is `https://infrive.ru/pbw?utm_term=bogan+tamil+movie+download+in+tamilrockers`, likely intended to redirect users to malicious content or phishing sites. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/pbw?utm_term=bogan+tamil+movie+download+in+tamilrockers PDF link annotation
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/3550656.pdfIn PDF document text
    • https://vexuzunudupugez.weebly.com/uploads/1/3/0/7/130740013/gifavegajunaxonegeg.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/417cb92a16846.pdfIn PDF document text
    • https://nobujudiwid.weebly.com/uploads/1/3/1/4/131452838/2555015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_60120a83ceb3a.pdfIn PDF document text
    • https://gimeboxevamovuv.weebly.com/uploads/1/3/4/4/134494840/8b2a4428.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/3164705.pdfIn PDF document text
    • https://duxupanitazubo.weebly.com/uploads/1/3/0/8/130813094/sisozero-loresomara-ligopes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fd60e6383807.pdfIn PDF document text
    • https://lunisaga.weebly.com/uploads/1/3/5/3/135302545/1cacb8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_5fe7af2cf3384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6b1ab406-64ad-4974-8664-b7b1b2dd2579/54698047841.pdfIn PDF document text
    • http://fixunomavow.pbworks.com/f/download_baidu_spark_browser_for_windows_7_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214e1cbf-b125-46fa-9c9d-f5a48a468b4d/xebifazagewukadajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc49565f-cb0d-4efc-ad14-c75ba1081cb2/97433341718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3253eabe-b631-4140-8b72-f5f861211428/detabekelobuvanuwevez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ddfc051-fa31-45a1-8fd0-40290b1f1bdb/39034551046.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/w/file/fetch/144808008/color_by_number_multiplication_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ae7a09-61e0-42f2-b5a2-256dad01601a/how_to_get_a_navy_and_marine_corps_achievement_medal.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144481275/puderifepomuxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 5312 bytes
SHA-256: 508835e81b2b1cdc904c891e24b7592cc4c88667f48f246939b38fe564bec0ae
font_01_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 10340 bytes
SHA-256: e51a015543767c6a343e61c56024c564ca6dd3ab9f1afea940cc1c856234a66c
font_02_sfnt_off00011eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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