Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd33012cd1bfa6b7…

MALICIOUS

PDF

72.9 KB Created: 2021-03-15 11:00:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65c224c89ccccaf7c78a7f1278421a55 SHA-1: 15a97f2e65a880ccd943ef0d960a1629ac22de1d SHA-256: fd33012cd1bfa6b7b6eeccecb873c3d7e64ff3c494bdb79e970e22f2d60c373a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9960

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://soxebez.ru/award?keyword=tuberculous+meningitis+classification+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481831/normal_604ccb69e714b.pdfIn PDF document text
    • http://quickpapp.online/will_genie_wireless_keypad_work_with_liftmastercoxsw.pdfIn PDF document text
    • http://deromgroup.com/how_many_questions_in_comptia_a_100134j42.pdfIn PDF document text
    • http://fusobilel.iblogger.org/normal_anomaly_scan_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381098/normal_5ff0bbdedc27b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_60490469c89c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6015ec02c86ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_60178ac448088.pdfIn PDF document text
    • http://sun-italy.space/44266525909hba7z.pdfIn PDF document text
    • http://help-violation.com/34454887339lhjdd.pdfIn PDF document text
    • http://zumodaronomana.iblogger.org/tizarasejukulanukivinot.pdfIn PDF document text
    • http://topfrag.rip/76788450049jotzc.pdfIn PDF document text
    • http://texno3ua.com/10609080584fqm6f.pdfIn PDF document text
    • http://dithetsen.xyz/how_to_use_black_and_decker_grass_hogbncdf.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/19479472826wgpb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukosinigi.epizy.com/business_infographic_template_powerpoint_free.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_cc5a9c2d89ce402a9a2aaf98b417d946.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_2a1875294ffc4d9c8dd4ea9d605289ca.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_4175d0b202454bdda81ad5b91a0361e9.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_b57d2dc02a1147ceb8fe1cf70eabab5e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a0d378-3245-44b3-b6b2-1840007a7b70/gaxiw.pdfIn PDF document text
    • http://lowazuxakosilal.epizy.com/7354960383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e289cd61-5b9d-4b98-bc2a-3e18baa3cff7/tinemafizusab.pdfIn PDF document text
    • http://sawonuj.rf.gd/xutevebivokafexosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26dca7a-bc24-4ed3-8df7-3e625a8d9445/67038501322.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_8c5ffd6598434d6da256788b7f61fbf8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 5564 bytes
SHA-256: 1866289c572c62f6740425ec5eba0e9b90115933f10a73527d4ad05ff29416d7
font_01_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 10672 bytes
SHA-256: 4a8b1a7e9842e84dd65c49fb490820c3fe95a41b805326b8be896d269bc21c74

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