Malicious PDF — malware analysis report

Static analysis result for SHA-256 08699b27e814911e…

MALICIOUS

PDF

80.4 KB Created: 2021-06-14 09:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c3eb79cf13abd94e1cd61f7a922be307 SHA-1: 8c92754ed985dfa077fc44730a0bdf634d9469dc SHA-256: 08699b27e814911e6cca572740eb89a90a31345ec6fe59f87fbb7aefae4dec0b
156 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. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. One prominent URL, 'https://oniceh.ru/uplcv?utm_term=get+followers+mod+apk+download', indicates a lure for downloading a modified APK, likely a social engineering tactic to trick users into downloading malware. No scripts were extracted, but the extensive use of external links and the nature of the lure point towards a phishing or downloader attack pattern.

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://oniceh.ru/uplcv?utm_term=get+followers+mod+apk+download PDF link annotation
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/1479cb8bdb4b843ac0abc819e3c293e0/lunanifu.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9459r07o7nrde25cj2i0sanl20/83245341009.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a5cf465fe5420f64de70c62f680a5520/labeluxibosoval.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e3dd1d52f---fukifevujelalasek.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160852bdfdbb26---rokawim.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933a3293d03---guropiv.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/940fed3f7c5e45d3f7e6f9e389835e1d/texebufopojajufapodiwoxu.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a552c164c---91312489212.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083039282dd9---81965386376.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/0c1b245ed55c8f2d9c791c5545fc08cd/28813951405.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/4191703bc810cfaa6233a33295eb0b31/68106640018.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/29055249815.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/a2b04b0db31d69ea5673d1f45a7df40d/24739571936.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/62485579208.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2a53d21fb---jofaligaxukegazajan.pdfIn PDF document text
    • https://windsbs.biz/files/file/wosoginabokex.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
    • 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_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 5112 bytes
SHA-256: 4e340b78d5f20ca42ee804dbe2767fb59d31b5224441f4c280999ea4afc018b6
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 11060 bytes
SHA-256: f3c48bb174595ccc88ab464d0bda4676ca59a7b9708466d8d5985f4f6c0ae134
font_02_sfnt_off00012680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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