Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a1b5ae4e64e359…

MALICIOUS

PDF

83.3 KB Created: 2021-03-29 07:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1e45594418664a6fb574d251dad9935 SHA-1: ef8a3fcd70c0e086327fbe0c3f2b0ace678cfb25 SHA-256: a4a1b5ae4e64e359c83f8303968e208fdfc60191879e972f64719c51ee03a764
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 0.9993

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://maypoin.ru/wix?keyword=jorge+garcia+2019+weight+loss PDF link annotation
    • http://pesowulil.iblogger.org/nivokolokidiwukapika.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/fgiihgi/zozevegojibosusal.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/12199918650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_60405314501a9.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hFgfiiU/niborapezivar.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/rockwell_factorytalk_view_system_requirements.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/19486926440.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/budapest_tourist_attractions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424982/normal_5fcf45b4a9f52.pdfIn PDF document text
    • https://cdn.sqhk.co/loxusovi/yjmwZjf/dasanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_604f398bdaca5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wimidisa.epizy.com/95336263938.pdfIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_e1b38a4aaba140e49537c53320edd97f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33be14d9-476c-4b66-b617-58724e56ca90/dexalexesevemisas.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_ecba5f2df6d947389c5d265821017f46.pdf?index=trueIn PDF document text
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_0b5f2710b6eb43eeae20647814543ce5.pdf?index=trueIn PDF document text
    • http://muzulozak.atwebpages.com/royal_hg12x_paper_cross_cut_shredder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d737982a-0a3e-4823-a7eb-1f188e10a372/3822453510.pdfIn PDF document text
    • http://jorasixu.myartsonline.com/47685757097.pdfIn PDF document text
    • http://tiwojojerat.rf.gd/microsoft_autoroute_2013_serial_keygen_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55498e3-2515-4320-ac72-7aeb13e70ae3/good_books_to_read_for_adults_romance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfcc807-d6eb-456b-87e7-9e4a66a19b5f/6897621914.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_4103d07e5f16469e8a41a27c668fe48a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb6e3f5-c301-4ba0-8bf5-0b11ac9f29ab/togopi.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_off00010763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 5624 bytes
SHA-256: d5659d3b3d760b02361daeb325afb8b4b73d5a94063a60aca316cd556b08f25a
font_01_sfnt_off00011a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9A 10840 bytes
SHA-256: a337906cda8f4956e81b9bf13d510150db2ac3e66cc797f1daeca1582d80236f

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