Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e1df83401e9590…

MALICIOUS

PDF

80.4 KB Created: 2021-05-19 01:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 10e78d20bdcad3c66d32031e8853da0e SHA-1: 11ab7ea1733dc006010c6659ee2176f0655843b5 SHA-256: 08e1df83401e9590caff4399519a2f539e598c3062dca4599e95534c214576d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=what+is+spatial+arrangement+brainly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475999/normal_605b92190a154.pdfIn PDF document text
    • http://getakabawi.22web.org/motikopizebasaven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_60406756d1813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_6024f06b98cef.pdfIn PDF document text
    • http://vavawosasote.iblogger.org/xudilij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_605a530eddcf0.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://bumezemenunaxiv.epizy.com/cellulose_acetate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805eca1d-7c02-4b25-8917-352841b220ee/mixubebugigot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2826520-c02c-4783-8a3d-08c6da033a23/mexunuronefiratawaxi.pdfIn PDF document text
    • http://kixomeremit.epizy.com/plant_virology_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39d0792-42d0-4ad3-90a3-3e46506e5574/how_to_have_great_communication_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9845f19-268b-41f0-abfe-3c295b8f97c7/ee_red_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f531ae19-10be-42d7-8288-bea74b219352/role_of_medical_social_worker_slideshare.pdfIn PDF document text
    • http://gorokezawofor.rf.gd/the_algerine_captive_summary.pdfIn PDF document text
    • http://fujufojijasowek.rf.gd/86360333469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37558b0b-3a57-449b-a585-823600bac924/how_to_play_silent_hunter_5_offline.pdfIn PDF document text
    • http://xotexipu.rf.gd/sufinejim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31904228-38e5-464e-858a-df6996a903d6/38162184011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75fd8c4-649e-49cf-8809-6cb397b11617/gurilixun.pdfIn PDF document text
    • http://voduvurikijo.rf.gd/90776246328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42770eb-2c17-4beb-983d-28bfe7ed1471/bushnell_laser_rangefinder_yardage_pro_sport.pdfIn PDF document text
    • http://repuvamiperubo.epizy.com/45030858645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b01345a-09ea-4451-b1cf-4b9e5b360b50/56433684568.pdfIn PDF document text
    • http://robowogutalopet.epizy.com/effortless_english_ebook_free.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_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 5164 bytes
SHA-256: 74810b254f8604e267bf80f19b63dbcdb418ea383251eff3b710f0fa9d91d950
font_01_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 10664 bytes
SHA-256: c822a0a1b990499fe3ba2f396c938bf94abd08a109e20b8b332969d9e20fb65f
font_02_sfnt_off000125fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e