Malicious PDF — malware analysis report

Static analysis result for SHA-256 8285fdec2be8e353…

MALICIOUS

PDF

67.0 KB Created: 2021-06-20 16:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 88a8a7637aa317709d7ed4d2a8d6596a SHA-1: 6fdfa76688665ef2f4b10c12510e2c7aed526141 SHA-256: 8285fdec2be8e353ec5784b495309e0849b5fee83e8742054c4b0ddb968c7537
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF file contains numerous links to compromised websites, including WordPress upload storage, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to downloading MP3 songs, which serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of further malicious content or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=itna+sona+kyu+rab+ne+banaya+mp3+song+download PDF link annotation
    • http://hotstamping.pl/files/file/fojesagozotusewawujeteje.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a84d9d7ae02a0a952fdf42cd15f43026/91680550957.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/73671024893127aa7fe4160df88c7375/suvivemetarimabofa.pdfIn PDF document text
    • https://sealskinz.ru/files/file/gemozemesaxizumuzoru.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/61141567320.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/aec6b37325e84ed3bea7a39107ae0a3d/8195687147.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9fmnio9p3ac9nb6bs2cvuo2r90/lifope.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f1e696b9eb999e658b300530d967f214/42233588290.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbfb3576c---45454835128.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe5ba91a5e---67595701360.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/zibajifukovuv.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qjd17esuu87qjtij475ff6oam0/mukakesi.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/83752da1692300f51f819c8b894b4977/supugozipuganitasigex.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/bkiql8c4jlkm942qtrr0skgd3r/votujixanepunadifaka.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/genujuwavaper.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/zevebobesekejito.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073479150f12---33288439756.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/8n73fq7n72b6omr4362m36uiak/84988563284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 5776 bytes
SHA-256: 9708cab8162d1ca24603ac2b971408f6e42d209a25364139e727bdb579ffef36
font_01_sfnt_off0000d678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD678 11324 bytes
SHA-256: adf734d0e98d2f1bb8de8f2a8a337ec99acb690d3dbaad7448ba377ec9c269e7