Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3804320f3a9ac14…

MALICIOUS

PDF

79.8 KB Created: 2021-06-14 00:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6b079756f142062f3c6ab67a1bc3f164 SHA-1: 210604d88e354d1167045e36f0ff15a32eb34fe3 SHA-256: c3804320f3a9ac149372345d01c3e86a9faa4c28f8c70aedb594c12ef15af64e
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 hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://queure.ru/pbw?utm_term=psycho+pass+kogami+x+akane PDF link annotation
    • https://baluwona.weebly.com/uploads/1/3/4/6/134611665/tusonewuwulexezese.pdfIn PDF document text
    • https://demujerifusa.weebly.com/uploads/1/3/1/4/131437649/fapoxitelugut_bewisep_pojamederadu.pdfIn PDF document text
    • https://gipavibipo.weebly.com/uploads/1/3/4/6/134654588/fivilidebafiduse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_604b2c09ce754.pdfIn PDF document text
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/87c3c.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/kabenulerivi.pdfIn PDF document text
    • https://movekepuvixoma.weebly.com/uploads/1/3/4/0/134041071/3642408.pdfIn PDF document text
    • https://tuzuratodaf.weebly.com/uploads/1/3/0/7/130738639/tonixipovojo_xumewi_laboxanopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_605bdcba1f888.pdfIn PDF document text
    • https://widisujo.weebly.com/uploads/1/3/7/5/137512014/komomipipo-ladal-kizevagililero-tefanenesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_60443ee154e7d.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://xigivesupi.pbworks.com/w/file/fetch/145185966/canopus_advc_110_manual.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/w/file/fetch/144690375/25198023212.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/w/file/fetch/145099845/tomorrows_forecast_near_me.pdfIn PDF document text
    • http://pewamez.pbworks.com/w/file/fetch/144897066/30785453401.pdfIn PDF document text
    • http://xedenuw.pbworks.com/f/95596071384.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/f/mi_box_apk_installer_download.pdfIn PDF document text
    • http://duriwug.pbworks.com/w/file/fetch/144842136/64145634567.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144461451/dental_equipment_names_and_pictures.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144890487/t24_user_guide.pdfIn PDF document text
    • http://foziwelisi.pbworks.com/f/23089633209.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE132 3336 bytes
SHA-256: 3451f694820b29a840e2363d7f12568ef3905d1f2c527ce3326bdd2a87d20b15
font_01_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 5160 bytes
SHA-256: 2ed92e53234658d41b8f362608014fc4d320cea320bdc8c9679b48702fd135a4
font_02_sfnt_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 11092 bytes
SHA-256: 9a1b3994855d97e1d8fe2e81c00bd9576e6722fb2ce4fe31befc60ea2cc044eb
font_03_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361