Malicious PDF — malware analysis report

Static analysis result for SHA-256 0026897439ef8e30…

MALICIOUS

PDF

110.4 KB Created: 2021-03-15 15:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7c1308169cf9977a87a1ca20793c208d SHA-1: dd8be2068b215a009e3ae5fc278161a65845e453 SHA-256: 0026897439ef8e30d687e7d5c5e8f353a25b360be08f24c683811604e640f4e9
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://jumiwimov.ru/wix?keyword=route+66+travel+through+the+bible+answer+key+lesson+8, is likely part of this malicious infrastructure. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=route+66+travel+through+the+bible+answer+key+lesson+8 PDF link annotation
    • http://turosofatilez.iblogger.org/pijozo.pdfIn PDF document text
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/zizuzogivibafutawut.pdfIn PDF document text
    • http://pojebanidik.mywebcommunity.org/the_digestive_system_anatomy.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/47546687176.pdfIn PDF document text
    • http://pusokum.66ghz.com/how_to_bts_run_episodes.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/doxeza-funupesu.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/naxolavewez.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://koronejukijon.rf.gd/how_to_mute_verizon_lg_flip_phone.pdfIn PDF document text
    • http://jirunogi.rf.gd/classic_wow_leveling_guide_map.pdfIn PDF document text
    • http://danebusuji.onlinewebshop.net/math_transformations_worksheet.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_b642e6a4ec59430cb3be41f507faa3b5.pdf?index=trueIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/creating_shared_value_porter_summary.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_428aa0b5b6164b1686b5cd45d7ddd64d.pdf?index=trueIn PDF document text
    • http://dupivet.epizy.com/cantata_de_natal_alegria_playback.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_561e0a26948342399cc68386c676f988.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/vuvisanaduzofaxutizudof.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/guvexadonokekutop.pdfIn PDF document text
    • http://zidotafezanu.epizy.com/burger_king_sesame_bun_nutrition.pdfIn PDF document text
    • http://femulupir.rf.gd/how_to_study_organic_chemistry_fast.pdfIn PDF document text
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_6bb72bd39f2d4b68879fda3720c2bcd5.pdf?index=trueIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_ed34dbdecd924ee0b27cc6d1fa99bb69.pdf?index=trueIn 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_off00016070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16070 5644 bytes
SHA-256: 5b0491cd73b687635f9372e6a8d666a571c7e1ed812f014e4de78ae50f6b234a
font_01_sfnt_off000173b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173B5 12036 bytes
SHA-256: aab318cca84392a39ef224c91b2986f4f8fd68a426ec037725b654ac6986786b
font_02_sfnt_off00019ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BA3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361