Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cbeb33b631a283…

MALICIOUS

PDF

82.0 KB Created: 2021-06-06 01:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae2a12c95b80e136ba2e3496ade8288 SHA-1: 5114f0d3c84885f61a185a79ae4b81355a7712a3 SHA-256: 05cbeb33b631a2839d798e3d657383178ee90d91ab569ae94716d14242e7656d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The primary malicious URL identified is https://philabc.ru/pbw, which is likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/pbw?utm_term=theme+of+sacrifice+in+a+thousand+splendid+suns
    • https://cdn-cms.f-static.net/uploads/4495246/normal_604d44ec1f95d.pdf
    • https://cdn-cms.f-static.net/uploads/4416789/normal_600ffe0b5d4c2.pdf
    • https://cdn-cms.f-static.net/uploads/4381973/normal_600cf4e8b0094.pdf
    • https://cdn-cms.f-static.net/uploads/4475565/normal_60638b568a00d.pdf
    • https://zugexegepu.weebly.com/uploads/1/3/4/7/134740595/midevadowamu.pdf
    • https://disezoken.weebly.com/uploads/1/3/5/3/135327633/a81a065a5c2fd.pdf
    • https://bifagawu.weebly.com/uploads/1/3/7/5/137512270/duvupunefipuxufafa.pdf
    • https://cdn-cms.f-static.net/uploads/4420602/normal_60608afd6b434.pdf
    • https://jilowenuvugema.weebly.com/uploads/1/3/4/8/134897306/3252117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b2e03e76-df5f-4674-bc12-a98425cbce18/clasificacion_de_cuentas_por_naturaleza.pdf
    • http://jozeluwofe.pbworks.com/f/nagraj_and_dhruv_comics_free_download.pdf
    • https://uploads.strikinglycdn.com/files/d5dbe9a4-be41-4b63-a85f-2b1dc8a2e265/mathematics_for_elementary_teachers_with_activities_4th_edition_answer_key.pdf
    • http://nugewil.pbworks.com/w/file/fetch/144620478/timupatewojivow.pdf
    • https://uploads.strikinglycdn.com/files/b6443512-8057-49e8-acb2-f2b0c5864206/hundreds_chart_blank.pdf
    • https://uploads.strikinglycdn.com/files/91236fa6-e253-4747-b02f-55cdf60ff5da/3896859460.pdf
    • http://zopujoxobug.pbworks.com/f/monosacaridos_disacaridos_y_polisacaridos_ejemplos.pdf
    • https://uploads.strikinglycdn.com/files/a6d560f2-015a-4cf5-9b34-645a25ddd713/epson_730hd_audio_out.pdf
    • https://uploads.strikinglycdn.com/files/58064d01-c1c9-4ac2-8e01-8ddf099e8ce1/59783506893.pdf
    • http://damopijos.pbworks.com/f/les_animaux_fantastiques_1_livre.pdf
    • http://zuvuzut.pbworks.com/f/best_ppsspp_games_2021.pdf
    • http://garewewaziwu.pbworks.com/f/rupuwupivodulafusukad.pdf
    • https://uploads.strikinglycdn.com/files/8e465aad-11ad-4899-a44b-d805dc521a22/nububuzusafenisali.pdf
    • https://uploads.strikinglycdn.com/files/39173f42-d393-4116-bc3a-3ff7c1e2e32f/worshipping_false_gods_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/c83b5cb7-10e5-4a37-90f7-275873d5aa90/why_is_my_dryer_not_drying_properly.pdf
    • http://nigezid.pbworks.com/w/file/fetch/144427197/5359460800.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefc.bin
94eafc505492824ccfdf89e7b0bedaa74f673614cc03caeacad6d3df8a8977da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 5344 bytes
font_01_sfnt_off000100ff.bin
b495bbe36bc1772018d1ec87653aeeffffb4cb2da214632236d9936f6d13ef7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 10352 bytes
font_02_sfnt_off00012479.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12479 16204 bytes

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