Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e68075c899db9e…

MALICIOUS

PDF

73.0 KB Created: 2021-06-13 01:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7ff302121c3305e4c423735cb326f43b SHA-1: 0583fd3b7f632fc3b1d9539171705b0a71662b52 SHA-256: f1e68075c899db9e6b4c83e1f96797ec837fe2648d353949e5119b7201e83ab6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The embedded URLs and the heuristic firings strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=dmvpn+design+guide PDF link annotation
    • https://tabikanopik.weebly.com/uploads/1/3/4/7/134705808/5854346.pdfIn PDF document text
    • https://jelisewisu.weebly.com/uploads/1/3/1/4/131410299/pegiz.pdfIn PDF document text
    • https://bubafoxir.weebly.com/uploads/1/3/0/8/130874260/vezigojexinaj_gomeme.pdfIn PDF document text
    • https://rijigajigife.weebly.com/uploads/1/3/1/8/131856487/996e5.pdfIn PDF document text
    • https://kamurodogoruvax.weebly.com/uploads/1/3/4/8/134887894/zowupatis.pdfIn PDF document text
    • https://mixirarorasuju.weebly.com/uploads/1/3/4/3/134317495/868999e6a7.pdfIn PDF document text
    • https://jejofiwapo.weebly.com/uploads/1/3/5/3/135312812/refezekuk.pdfIn PDF document text
    • https://fagezatev.weebly.com/uploads/1/3/4/7/134711774/d443f4728c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tazevedijuk.pbworks.com/w/file/fetch/145215033/minecraft_apk_new_version_2020.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144700164/what_does_the_bible_say_about_respecting_other_peoples_property.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3a675f-2104-45ef-9d02-1afc7edfeee8/objects_first_with_java_6th_edition.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/supply_and_demand_activity_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c792400-c3b4-4e35-92be-9a7f275d94c0/noniwinekige.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144427011/61117999989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a903bc04-d9cc-46b1-9fdd-62d6e9209528/81840298178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184e7873-dfc7-4169-85b5-759e70fb6c03/structuralism_in_literary_theory_and_literary_criticism.pdfIn PDF document text
    • http://muxapoxowo.pbworks.com/w/file/fetch/144646176/kpss_tarih_soru_bankas_2020_yandex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c199cb-56fa-4602-93de-ca30791c0769/57493316155.pdfIn PDF document text
    • http://faxofapuf.pbworks.com/f/batatulilukikixavi.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/w/file/fetch/145083252/juronirulogus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa128c3d-b103-440f-843b-b85199bef956/dividing_fractions_games_5th_grade.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_off0000e1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EB 5000 bytes
SHA-256: 864beeefd38e9caa8737abcbdcf8e49d49b91246776a85fb9ef08091e96eecc0
font_01_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 10452 bytes
SHA-256: d280db7e552477399c7e1435411c4afce18983740d478fff87d08f851cd91d3a