Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f28047b1b082441…

MALICIOUS

PDF

75.7 KB Created: 2021-06-10 18:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 884c214fe6f8fa470dc4de0515266860 SHA-1: 0ea88adc871ae07f042a0dacc88a7a8aad0f8aef SHA-256: 2f28047b1b0824414de222f5c40084388aafe3810b79101588d9b92af348530f
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 hosting, suggesting a link farm or phishing operation. The primary URL, 'https://ketchas.ru/pbw?utm_term=shin+chan+buri+buri+kingdom+movie+in+tamil', appears to be a lure, possibly to a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ketchas.ru/pbw?utm_term=shin+chan+buri+buri+kingdom+movie+in+tamil PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fccb4b58762f.pdfIn PDF document text
    • https://lepivigodegobuz.weebly.com/uploads/1/3/7/5/137505729/miwixapasa-zobitilalope.pdfIn PDF document text
    • https://wasexakenisopi.weebly.com/uploads/1/3/5/9/135982815/ee907d.pdfIn PDF document text
    • https://rebuxikaxaj.weebly.com/uploads/1/3/4/6/134668288/kagibedijimemesow.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/benefiruwenitikef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_60b94f7db0a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_602c228163b5d.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/jabonedifajage_xupipuwelit_tixarejutej_sagofisevexudir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_60135f2cac935.pdfIn PDF document text
    • https://vimawagugagepa.weebly.com/uploads/1/3/4/7/134732412/a05d71a5b5.pdfIn PDF document text
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/kigozop_xojekigavor_bobitofavalum_nogumur.pdfIn PDF document text
    • https://pelepidavivi.weebly.com/uploads/1/3/1/4/131454492/4248422.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/517389ae90f037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144630471/adding_and_subtracting_integers_using_counters_worksheets.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/22877689680.pdfIn PDF document text
    • http://wuvefetefi.pbworks.com/f/7167148613.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/pufapomoretatiz.pdfIn PDF document text
    • http://zuwofig.pbworks.com/f/romebatogaguraguraxerim.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/cost_to_replace_flame_sensor_on_furnace.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144423102/fox_hills_stores.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_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 3060 bytes
SHA-256: b625bfbe719baeb478ffcab862a9ca35eca5a7785001715cb3fbe453437d53a0
font_01_sfnt_off0000e856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 5540 bytes
SHA-256: 2d84fc12a7888b70cd4af5bc35f8d785a56c222d97af5273889f208bec764551
font_02_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 11076 bytes
SHA-256: 33ced332044398c0baad5ea33940090ba60fbae7bb980bc8100bf6059e15e3a4