Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89766fbeef83e3c…

MALICIOUS

PDF

76.5 KB Created: 2021-05-18 06:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b822109cf86666bef845fa8340f153be SHA-1: bde4f9a3a2a36aba5a742ecd8a63a496b938bc6e SHA-256: d89766fbeef83e3c89956ae51b211a0cb99a3db047280572727e0f5a57a554c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://lozipotod.ru/strik?utm_term=vivid+workshop+data+ati+11.02+crack PDF link annotation
    • http://xukebovuw.22web.org/tafilapiloxen.pdfIn PDF document text
    • https://vafumesaz.weebly.com/uploads/1/3/4/5/134589630/8455737.pdfIn PDF document text
    • https://ladujeka.weebly.com/uploads/1/3/0/9/130969399/3501433.pdfIn PDF document text
    • https://xuxuratedagofat.weebly.com/uploads/1/3/4/6/134644764/badenaxuxod-zixigoje-fatufobufosage.pdfIn PDF document text
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/144bbc51a1f8d3.pdfIn PDF document text
    • https://luxanuritaz.weebly.com/uploads/1/3/5/3/135346697/vajutigow.pdfIn PDF document text
    • http://devumixik.iblogger.org/44466183030.pdfIn PDF document text
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/6146177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soripewanadu.rf.gd/59825884415.pdfIn PDF document text
    • http://panawokel.epizy.com/12950396289.pdfIn PDF document text
    • http://puwokamavureme.rf.gd/velipufozataseluvadefos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b38233d-fb1d-4466-94df-8952b508cc47/are_wii_remotes_interchangeable.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/emulateur_android_memu.pdfIn PDF document text
    • http://vogasuzifen.rf.gd/computer_science_syllabus_high_school.pdfIn PDF document text
    • http://mezomiwewelebe.epizy.com/clinkz_dota_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/vufofabulisij.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/escape_room_answers_level_79.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2ec94f-fa45-47af-aa9c-bbab26d1cdbd/acer_t232hl_abmjjz_23-inch.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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 5668 bytes
SHA-256: a20a63d2b188131c58a2c0fa68f95afdad63a3757382ec21553673d885573e67
font_01_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 12060 bytes
SHA-256: 4f743f21723c4d81c71e00d78bcc98230843cec25c67cbc0ef0a4012f7215a5f