Malicious PDF — malware analysis report

Static analysis result for SHA-256 697ab938df79ac2e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 04:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 92d210ee0285d43850cfa2aba9b40c2a SHA-1: 5aab617fe8ddcb183d763d99078147c7a7ff0b49 SHA-256: 697ab938df79ac2e6c1ab7f391826b510237b13270dab2661082789f81fd810d
186 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, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting, characteristic of a link farm. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=delta+band+saw+fence+sale PDF link annotation
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/tulerepig-gofexid-kagidew.pdfIn PDF document text
    • https://mitumeme.weebly.com/uploads/1/3/4/8/134879381/wabasagabikoziteg.pdfIn PDF document text
    • http://sushibara.net/kodudefitesagaramibka398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_6035f5bdd0215.pdfIn PDF document text
    • https://xekariwunaju.weebly.com/uploads/1/3/1/0/131070431/b870b823a720e.pdfIn PDF document text
    • http://sarhello.online/zipafesowenapijudetobunuz2erk.pdfIn PDF document text
    • https://pabametutib.weebly.com/uploads/1/3/5/3/135317572/597735.pdfIn PDF document text
    • https://fuvetozexogix.weebly.com/uploads/1/3/0/8/130874326/tibake-gipemuzuwuwidi-pomerojidunadi-sagoku.pdfIn PDF document text
    • http://betmoy57.com/jigogodisojadq0dwm.pdfIn PDF document text
    • https://buralekareze.weebly.com/uploads/1/3/4/3/134326789/mofigiri.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/272528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_6038c6ddcaa1a.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/xinuwiwolap.pdfIn PDF document text
    • http://legendbilisim.com/bible__world_history_timeline_wall_chartyd2eg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_09621d449c854539832be0a5ff134c75.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_15fa586f93974bda84c575cf790544e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/discrete_mathematical_structures_dr_dsc_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/96576428625.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/u_can_t_touch_this.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_77e1791857f048c28b5713661f3ad7e0.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_aac8d4f0d1c24ebcb0e6801b37b28fa7.pdf?index=trueIn 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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5152 bytes
SHA-256: bcea82a26bfbfd2350e10f47fe099249f338c73f38dbdb11a60cee36185b1bf4
font_01_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 11428 bytes
SHA-256: a3a099376fe3ebda00c4f7c5516ce83c8faa5972838e34f89c94fe21e88a481d