Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d54d7c26182cc9…

MALICIOUS

PDF

79.1 KB Created: 2021-05-27 19:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60c3516fc1d717824dd7226bed16c8d2 SHA-1: d871b872ea21208af65f8ec447d913fdba9604cc SHA-256: 05d54d7c26182cc925ec71b0047c368b1ceaa276670d5aee64c6dc34b078c0b0
186 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 0.9995

Heuristics 6

  • 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.
  • 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://soxebez.ru/strik?utm_term=track+1+and+track+2+generator PDF link annotation
    • https://gepolurur.weebly.com/uploads/1/3/4/6/134610134/b8414bf.pdfIn PDF document text
    • https://danuxuzajuzawo.weebly.com/uploads/1/3/4/7/134768569/pawur_xumok_levig.pdfIn PDF document text
    • https://miluxeto.weebly.com/uploads/1/3/5/3/135326788/terazavesesiv_zokuwonuzebef_wisusu.pdfIn PDF document text
    • https://nefakemibozike.weebly.com/uploads/1/3/5/3/135314079/93496.pdfIn PDF document text
    • https://padipemoton.weebly.com/uploads/1/3/0/7/130739419/cc0b9f.pdfIn PDF document text
    • https://mazogerivajusem.weebly.com/uploads/1/3/4/3/134341978/62c592.pdfIn PDF document text
    • https://lukejofavum.weebly.com/uploads/1/3/4/4/134455809/zumuwun.pdfIn PDF document text
    • https://rejowuboxobe.weebly.com/uploads/1/3/2/6/132680789/4821225.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/5844357.pdfIn PDF document text
    • https://tomojuvugitem.weebly.com/uploads/1/3/4/4/134475437/f5c4618df.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/pexuv.pdfIn PDF document text
    • https://rufuwoja.weebly.com/uploads/1/3/4/7/134735928/d63da.pdfIn PDF document text
    • https://novedoxax.weebly.com/uploads/1/3/4/5/134512377/ce79e.pdfIn PDF document text
    • https://muvipedoboxeju.weebly.com/uploads/1/3/1/1/131163867/fovufofawon.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
    • https://uploads.strikinglycdn.com/files/f8df05d6-4c24-4f0e-bbce-3754dc4a5675/70548489431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39caadc-36ed-41f6-a582-e1023108d6c9/how_to_reply_email_to_decline_job_offer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e8787c-7733-4319-baf7-ac36bde0cc51/lomafalamasolewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b401308f-7d53-47e9-bce5-ac85bae1ac6a/how_fast_is_a_police_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8ec9f5-6637-4dd0-8b40-ea3805cd7dad/6758619051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7321938-9c00-40ba-b82a-22614e6eae1d/how_to_connect_directv_remote_to_direct_tv_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f72d37d-95ce-453a-898d-2895d342d2d6/what_is_the_story_of_your_life_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4fb584f-9ae9-4893-a744-e3359b69ce0b/dell_latitude_e7450_core_i7_specs.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_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 4832 bytes
SHA-256: 5d5462c2d077278c9c542bbec2f0fa7abea56ab4ddcfa1f1cb1021a018f20dd0
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 10504 bytes
SHA-256: 608741749ed97c6fb08c93b49719dd5d946c2ffad9012c95b6152b3a839cfa24
font_02_sfnt_off00011f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3