Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c763b4e93a4c924…

MALICIOUS

PDF

69.6 KB Created: 2020-12-01 02:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 53a9504fadda35bc6ed5209c9b12962a SHA-1: a316f3990f8e937a5d8965d1a20400a8a064d599 SHA-256: 8c763b4e93a4c9247e4aab1582464d752a3dfdcb1296106af970b09040458b8a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/aws?utm_term=report+a+hit+and+run+in+california PDF link annotation
    • https://mejebogisoxofix.weebly.com/uploads/1/3/4/6/134606558/9525f948df82a5.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/abc4e44de7c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/libro_aprender_aleman_en_7_dias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e37112-41f2-459e-b7fa-fbc49867c362/3867339191.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/jobefinivi.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/journal_ennahar_archive.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/definitions_of_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/79107989412.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/pakuxizutokabixezorir.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/rupikob.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/katekyo_hitman_reborn_episode_list_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/gikasimixubiletufifeb.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/sotezesexonebokasufiram.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_off0000d461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD461 5072 bytes
SHA-256: 8bd1d48957c5eb082a7e00a7fec62581603904afe48e3c7ece5de2f82df2f4d1
font_01_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 10552 bytes
SHA-256: 6df780cabab30844a11cff846d784b974fdb623fe1f1961ed3ebfa34517e1cb4