Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f9d00027759437…

MALICIOUS

PDF

74.4 KB Created: 2020-11-16 22:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b5ecfd2a029f190d6d8537b34982f2f SHA-1: 5b57ef2d10db8d39dd8c01bd82fbf675617e329a SHA-256: 63f9d00027759437a87a21e77bc65ab34f333779d0c688a1a61cb309d86b2f64
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 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=dark+symbol+extraordinary+adventures PDF link annotation
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/zamopot_palezufepo_japise.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.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/divexikav/oxford_dictionary_english_to_hindi_meaning_download.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/bedford_guide_for_writing_tutors.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/55173559906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e885a3b-dc1a-4c65-8192-c7b189f288d0/gowelizudek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae8973f-6531-4a64-b772-905e94a5b80c/talcott_parsons_aportaciones_a_la_sociologia.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/the_wolves_by_sarah_delappe.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/30007461020.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/nintendo_wii_game_console_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/wheat_belly_total_health.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d3fc319-9c3b-4164-89a1-2a68443e133e/vebexogusukizegoz.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_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 5404 bytes
SHA-256: e4e1403117e1d105f02b794a6e092776c19ccc9dee939a1ebb10fdf15f46b94c
font_01_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 10556 bytes
SHA-256: 63ea0002314ea0b0f0af8b6f38eb1f50d16e1ae9e54833bdbbe6f781cdd5bb65