Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b60f1a6d20d42c…

MALICIOUS

PDF

88.0 KB Created: 2021-05-18 10:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e3a8270ae03a057b7565ab2de24d536 SHA-1: 54d70d2592c0a0a6eea899a90650d605fa9b9520 SHA-256: b2b60f1a6d20d42cac1ddcb2f7b5b652e04a2eba3bb22e31ef92dd84fdb6ed85
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 0.9991

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=the+passionate+shepherd+to+his+love+meaning+per+line PDF link annotation
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/xawapafuxadawimegora.pdfIn PDF document text
    • https://lisomoduxu.weebly.com/uploads/1/3/1/3/131383329/9280504.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/gekovekafetavamore.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/fulene_bunafez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_6051e0a85f038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fe4e589d97c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454679/normal_603711e99aa4b.pdfIn PDF document text
    • https://ludutuwe.weebly.com/uploads/1/3/4/6/134687162/e677f.pdfIn PDF document text
    • https://dusaxufar.weebly.com/uploads/1/3/5/3/135327992/ca2f3b9.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/tawawuvegosora.pdfIn PDF document text
    • https://dopizuledukure.weebly.com/uploads/1/3/2/3/132302960/b5d26089.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/5ede322c3c2.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/totilinipuse.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/51180ab6-23ca-432e-9580-1a32a954a81a/what_is_the_definition_of_a_primary_caregiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31cdab0e-edc9-428f-8dfc-b33f8bc24d72/what_is_safety_osha_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a7e97f-f736-468e-a59d-a0244f544e4d/o_mehndi_pyar_wali_mp3_song_download_mr_jatt_remix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1911861-e8e9-4f72-a1f2-54115828e657/jeboxokovul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfb950b-8403-4d0f-acd0-facfaa14fd49/how_to_shut_off_ringer_on_panasonic_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8be86d2-4d90-4262-98b9-77c50be40f57/29083022570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a061be-ceba-4d51-80cd-46372b56ddfe/ibm_data_analyst_certification_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5302aa54-cd98-495f-81a8-161aaf40fa13/tutamat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65195b5-1e71-47aa-9110-1fc91d53e1ec/71836849585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd63cae9-a096-4b85-b496-94b977a350f7/spotify_account_generator_discord.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_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 5172 bytes
SHA-256: 14cc4e82d7345801cb7c674e9d64b31f633c8adb7dfd4b75f92d1d759502c9cc
font_01_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 11280 bytes
SHA-256: b72f1155f2fec451e5f93e731aac0f45a2ec4e4c966ca36c0b5eb5ff7f971a23
font_02_sfnt_off00014230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14230 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361