Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdccf37a0deebaf9…

MALICIOUS

PDF

61.8 KB Created: 2020-11-18 08:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ab151ec9ab05cc43ac278317cfad21a6 SHA-1: d3ddc1ef86f75ce4010268c51ef5482e6c354c4c SHA-256: bdccf37a0deebaf9a5e5e386599f0039e4be752617f702df81592e090acf1175
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/123?utm_term=no+me+olvides+nunca PDF link annotation
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/7c85ff5f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f871eb1d6415.pdfIn PDF document text
    • https://jonowukamox.weebly.com/uploads/1/3/4/3/134372820/rikodujires_vomewabogime_basetisugef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5fa8e321bdf52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5f919d10ce246.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/riwurujivabukefula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5fa2f08212501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8a250ce3f70.pdfIn PDF document text
    • https://tuvunexe.weebly.com/uploads/1/3/4/3/134327091/9163275.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/visuwazuxejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6dd2e7-6b37-4304-96e0-1bd06074d003/kark_seme_trkler_40_adet_mzik.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/glossary_format_word.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/xikakuw.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_off0000ada6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA6 3148 bytes
SHA-256: a35250c0c8577f3d2a65ff989358109bf82b41558d11595403ec7bde62c0c0ca
font_01_sfnt_off0000b8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C0 5016 bytes
SHA-256: faa94b1d7f36feeefe76209fb4021eab02b4b83e964cb69207601aadf215e00c
font_02_sfnt_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 9628 bytes
SHA-256: b39c27f13bacf163c9f8ea57ba949b3557cf5a8a434c29fc36fd9da66f066a85

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