Malicious PDF — malware analysis report

Static analysis result for SHA-256 07119eae21d41f06…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 08:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a3d3c458d7d7ee8cea72cd9c0bb0440 SHA-1: db029a5d2cfff2a0c45abe83aa2d9eb61ff9d160 SHA-256: 07119eae21d41f06d27de3e911d57c0c8246378616bfb05c5b8ed28bf62422c2
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 0.9993

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://baarspo.ru/123?utm_term=boll+and+branch+sheets+reviews PDF link annotation
    • http://milesnires.xyz/newborn_apgar_score_sheetpoitc.pdfIn PDF document text
    • https://cdn.sqhk.co/jexozumumanu/PGgjjdL/farmers_almanac_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/ierlDif/73692968301.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/fodefifixobine.pdfIn PDF document text
    • https://vixekilawuta.weebly.com/uploads/1/3/4/3/134305586/bc2f9574e6c.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/juforenuje.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/9260706.pdfIn PDF document text
    • http://henrysavbr.site/fallout_4_console_commands_.308_ammobh8au.pdfIn PDF document text
    • http://hr-insider.com/256614155344chkb.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/xyiahgH/red_space_ranger_costume.pdfIn PDF document text
    • https://wotuterivakevom.weebly.com/uploads/1/3/4/6/134608936/reroxulonoridap.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/dAhepvk/lelojimabupipo.pdfIn PDF document text
    • https://muxuxinipizo.weebly.com/uploads/1/3/1/6/131637853/fexuse_muxivulap.pdfIn PDF document text
    • https://wevenakexeg.weebly.com/uploads/1/3/1/4/131438808/nosizetemoz.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/vekebunixazidiv-rixujigeveleli-sidituri-ronikokese.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/CvCjcJA/somejotede.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/badae282b185.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/jhf3ifF/64433612088.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a74d582-9063-4899-ab21-3851d05e68e6/how_to_freeze_frame_in_premiere_pro_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffd04c3-a90f-4934-be07-1c92cb1e2d30/what_topics_are_covered_in_social_studies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f354ef-4aa0-405e-9b52-f67418115185/63906000831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71d9c9d-6bf2-4fee-a538-eb600dfa33a7/what_is_the_biblical_evidence_of_purgatory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2e51bd-554a-43a7-b5f2-013b57ea461c/ap_style_guide.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_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 5368 bytes
SHA-256: a27b85c43d1bb2e858f5e6d331556034a7b5d2df4a932322a732e6959711571e
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 11140 bytes
SHA-256: 5def73e19c54b9994ccade28728f8af250a2d14d6b35cd797d71c475d4e62a2c