Malicious PDF — malware analysis report

Static analysis result for SHA-256 1724911505f9c6bb…

MALICIOUS

PDF

84.5 KB Created: 2021-04-06 11:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06ecfc0ef911de4da4a700277b6b007f SHA-1: 04bca5cb4cd8e21e8df123efc870691885cb754f SHA-256: 1724911505f9c6bbd29634b4861ae21806e3dd2213eb525ae253ba300be634da
186 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. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The primary malicious URL identified is https://vilenefex.ru/award?keyword=ghatna+chakra+gs+book+for+ssc+in+english+pdf+2020.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://vilenefex.ru/award?keyword=ghatna+chakra+gs+book+for+ssc+in+english+pdf+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491665/normal_600109205cbf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_6056b70e360b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_60589c3e97694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_602ace0ce41a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fc9aa275d1b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_601e12eca6417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_600266cc55863.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/2b9d60b3-971a-4a65-b180-9b338865d17e/6061262506.pdfIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_185789486b674e449b83c24c924a41e1.pdf?index=trueIn PDF document text
    • http://pizobuxawefi.rf.gd/57561994691.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/why_learn_python_in_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/how_to_use_pine_sol_to_clean_bathroom.pdfIn PDF document text
    • http://jupanadipi.rf.gd/superlative_adjectives_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/jujovopajuval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8321e95a-1fef-4e28-9b50-cdb128773f13/xiduwega.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/lost_tribe_of_the_sith_purgatory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f3b997-b659-4bc6-a8ee-85d288ea730d/what_is_arbys_happy_hour_menu.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_635e7f4bb57740f7b8807205b00653d5.pdf?index=trueIn PDF document text
    • https://4c69d07c-928c-405f-a1ab-6436392658c4.filesusr.com/ugd/4c264d_3c31a41ebe9946a883758a3431dd2d86.pdf?index=trueIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_33ede0f179574098be695d1ff321bc1e.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D1 5716 bytes
SHA-256: 75b48c727371015cfec49d5970aebb54a19c792f656f8e453e123a8951730b51
font_01_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 2764 bytes
SHA-256: 6134a7930c4b1dc6a5ea656afa3274eb9d841d019f17110ffa43163fffa6efeb
font_02_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 11400 bytes
SHA-256: 1ce70ab5fc3aa07b357d96ddb95429b6f1bbdbf91129a74d29c3b6972a6e9784
font_03_sfnt_off00011812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11812 16620 bytes
SHA-256: 78c9397a8f4397362a87c35c0d3a1d5c50408c01e4a6609b332568267e2b34ce
font_04_sfnt_off00012ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_05_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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