Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c2efc6f2f8ed65…

MALICIOUS

PDF

84.4 KB Created: 2021-06-05 00:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3afb1d44e6dbd26cf5bc101c61920862 SHA-1: 9731dd8951171bedef78cd5ec85d9097a4802b4b SHA-256: 32c2efc6f2f8ed65bdb810047ab8f66a9e08956fddac1cef8cc80222ae8d0fcc
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/pbw?utm_term=schumacher+se-4022+manual+wheeled+battery+charger+%2526+tester PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426677/normal_604fbf16c6668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_60ba94a20f125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5fe75a3fde59e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_60276f968ebad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5ff13504203ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_6047363b2b419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465907/normal_60ba988dc7c0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498324/normal_60634d8158530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443809/normal_5fcbbcb472109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483346/normal_605e037fc3290.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
    • http://gitixofipoxu.pbworks.com/w/file/fetch/144610764/magix_music_maker_2019_free_download_full_version_with_crack.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/49219219142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a1793c-0df1-47c2-9ed9-8d0864dc7c48/mnps_pay_dates.pdfIn PDF document text
    • http://rupebaxo.pbworks.com/f/bafagogafatodolagezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714f9732-f8c3-4af7-be39-ee9cf17881e4/21757342074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d716c255-b555-433f-ba60-ecb46af6a9fe/windows_movie_making_app_for_android_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f2ce59-93d6-40be-afea-130400dfbdad/teach_your_monster_to_read_price.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/f/how_to_download_gta_5_iso_ppsspp_game_for_android_in_78mb_only_for_android_download_now.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/w/file/fetch/144413268/florida_civics_economics_and_geography_teacher_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8682bdcf-03a9-48a8-bc3c-e097cdb32ddb/habibi_craig_thompson.pdfIn PDF document text
    • http://kizisoj.pbworks.com/w/file/fetch/144515559/south_indian_movie_filmywap_download_2018.pdfIn PDF document text
    • http://zejokij.pbworks.com/f/xolokerunobozuporuzezene.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/fikoxixowef.pdfIn PDF document text
    • http://depowota.pbworks.com/w/file/fetch/144510837/clash_royale_for_windows_phonecats.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001174a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1174A 18768 bytes
SHA-256: 736317d43b2cca0c349ea75c009645c06f54bdd459c013df9d95f0b66971908a
font_00_sfnt_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 5908 bytes
SHA-256: eb0d222a611eec791df164fc643e7865e47a177a56139628844f50d08f8cffb4
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 10552 bytes
SHA-256: df888db2a43520d1846c774b32028cec43f7830cf1c8f7d2b8237f11c3cdaa87
font_03_sfnt_off000134a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c