Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbcd10a032cfea3…

MALICIOUS

PDF

89.9 KB Created: 2021-03-21 23:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 16197921936752d32a44306df31a9806 SHA-1: 35e738af1b347724643406a200edf3cd158f74fd SHA-256: 2fbcd10a032cfea3ca5e3a83c5dff90f27cef604c27f16a7acceca71c582ea57
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on 'https://lozipotod.ru/wix?keyword=the+lonely+island+tour+2019'. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The ML classifier also strongly flagged it as malicious. No scripts were extracted, but the structure suggests a phishing or malware delivery attempt via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=the+lonely+island+tour+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428052/normal_60322bf9f00a5.pdfIn PDF document text
    • https://guzokilib.weebly.com/uploads/1/3/2/7/132741743/edebfe59a2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_603917fc7edf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_604a609b890ab.pdfIn PDF document text
    • https://dejamemetegabov.weebly.com/uploads/1/3/1/8/131856029/4103568.pdfIn PDF document text
    • https://nufomesamibu.weebly.com/uploads/1/3/5/3/135332564/b3eca87b.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/18f24282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6050d9676d0bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_5ffa2c4002fe7.pdfIn PDF document text
    • http://dapumad.iblogger.org/what_is_the_biblical_definition_of_marriage.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/cba1720b-b95d-4601-98fe-9da401d7b26b/wenajuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8a73aa-3d72-44de-9bc3-01eafa705749/50_shades_of_grey_soundtrack_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4971514-f6e6-4a9b-b6fd-0bd277f9334e/9668373869.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/naval_academy_ring_dance.pdfIn PDF document text
    • http://pugorenorow.epizy.com/ryobi_ts1342_dust_bag.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/alien_resurrection_ps1_manual.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_481381fce1b94eaabf5283fd63c3a10f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/how_to_connect_merkury_wireless_headphones.pdfIn PDF document text
    • https://1d20f49f-ccd6-4d05-b9af-9ecc574be1a3.filesusr.com/ugd/7b50d7_26368c1cfa77410c994c02565860769b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8192c00-6414-4a4b-a630-52f02ead3bd2/25912483465.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 5328 bytes
SHA-256: 73c44edf33e81229428c1cc748fb7532f6ca7dd9538bcfc99d7a641189ccf0a7
font_01_sfnt_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 11744 bytes
SHA-256: e494b04539b531db14babec7c1206152ccc01e9dc38da0c4f3cac8defa8b3cc3
font_02_sfnt_off000136d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D0 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00014bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3