Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9fd95a714254c1…

MALICIOUS

PDF

76.1 KB Created: 2021-06-13 07:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 18ac1682844c58bf8638087748438180 SHA-1: 5f871d783afc5cb8b045d79a18e72cda0e3701cd SHA-256: 0c9fd95a714254c1f6c3600dcbda0f3355d09219de29e4f2a794bd20fd8a37c2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=thandavam+piano+music PDF link annotation
    • https://xomaribimufad.weebly.com/uploads/1/3/1/1/131163516/cc957c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_6035c46e98296.pdfIn PDF document text
    • https://degovemidim.weebly.com/uploads/1/3/4/0/134017519/sevorutevafe.pdfIn PDF document text
    • https://dufanidozit.weebly.com/uploads/1/3/4/7/134764520/fc727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_604fd67da5601.pdfIn PDF document text
    • https://verobegami.weebly.com/uploads/1/3/0/8/130814611/9054083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5ffd52494862c.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/aa7dd375a.pdfIn PDF document text
    • https://firajapototirop.weebly.com/uploads/1/3/1/4/131452771/8242c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_604da87373986.pdfIn PDF document text
    • https://wobajaxeme.weebly.com/uploads/1/3/4/3/134350369/wunepifeduvurubin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_5fdb8b5a95669.pdfIn PDF document text
    • https://verukutuxa.weebly.com/uploads/1/3/5/3/135330203/mapafafuxowekelebal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411700/normal_5ffba17194467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_6029028a106c2.pdfIn PDF document text
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/5933335.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://degagogo.pbworks.com/f/how_to_manually_regen_culligan_water_softener.pdfIn PDF document text
    • http://vejivab.pbworks.com/w/file/fetch/144462039/45927496941.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/how_to_write_an_appeal_letter_for_a_denied_claim.pdfIn PDF document text
    • http://jobagej.pbworks.com/f/34911570562.pdfIn PDF document text
    • http://wojoxevom.pbworks.com/w/file/fetch/144777429/ace_attorney_free_online_game.pdfIn PDF document text
    • http://litorabi.pbworks.com/w/file/fetch/144524499/google_play_store_download_old_version.pdfIn PDF document text
    • http://pajawazo.pbworks.com/f/53375023610.pdfIn PDF document text
    • http://dakenesemi.pbworks.com/w/file/fetch/145220595/waxogexomowun.pdfIn PDF document text
    • http://ronejoxerer.pbworks.com/f/jugenagugaxenozugopej.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/145007781/subway_surfers_unlimited_mod.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE20 4876 bytes
SHA-256: e710c8db3c524551827ffab190b9f89d7ac6654a5047ed4b25301613ae57c10b
font_01_sfnt_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 11268 bytes
SHA-256: d673436876b6b7b016b564f7c807fef86951592ca30b1010a62158b275e4739a
font_02_sfnt_off00011465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11465 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.