Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d7fe22dfa26015…

MALICIOUS

PDF

80.0 KB Created: 2021-03-03 02:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7cba3c981b7abfc66dc656637d422b76 SHA-1: dd90621e6303fcfec66806a6a1b7bafdcb3d8506 SHA-256: 11d7fe22dfa26015cede837b813afb32ed316331c1e638f573b6cc79be43e48d
186 Risk Score

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 domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious content, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ponafet.ru/award?keyword=schenley+park+pavilion+rental PDF link annotation
    • http://krokoboko3.xyz/fallout_new_vegas_nexus_mod_manager_or_fommfh594.pdfIn PDF document text
    • https://gikositaga.weebly.com/uploads/1/3/4/7/134773380/7a2ef58cb.pdfIn PDF document text
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/jiferu_naxubifi_sedujobegajur_mogoderixubivew.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/2657663.pdfIn PDF document text
    • http://bestsalestoday.xyz/31295354389j34ny.pdfIn PDF document text
    • https://bovusobovazova.weebly.com/uploads/1/3/4/5/134596491/687252.pdfIn PDF document text
    • http://trellos.fun/expeditions_unlimited_mapbayfb.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/26399254731.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/measuring_angles_6th_grade_worksheet.pdfIn PDF document text
    • http://rodina38.ru/69400859941r1hal.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/10630564505.pdfIn PDF document text
    • http://autoport76.online/millermatic_135_gunkr925.pdfIn PDF document text
    • https://tadazumagitose.weebly.com/uploads/1/3/3/9/133987040/7072d4e0.pdfIn PDF document text
    • http://kzrovk.xyz/mariam_khan_reporting_live_show_timingtuok8.pdfIn PDF document text
    • http://lnstagram-helping.live/fagoxttrdx.pdfIn PDF document text
    • https://rurezakofone.weebly.com/uploads/1/3/1/1/131163981/435326.pdfIn PDF document text
    • http://golosa-spasibo.ru/21618248719lw1yp.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/695a3ebb82.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/4cf99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesuvomekujidi.rf.gd/60560873613.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/christmas_party_flyer_psd_template_free.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/best_hunter_guide_wow_classic.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 5172 bytes
SHA-256: 4037f39358a91badfc519e204fdeb8d0a6c52014762633a07529cdf73da3cf4a
font_01_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 15052 bytes
SHA-256: df7fe8443922699939c9c4dbbc1be6a878ae2a5f9f4ccdaf524e6ab0da707d70

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