Malicious PDF — malware analysis report

Static analysis result for SHA-256 295de870aa8895df…

MALICIOUS

PDF

77.9 KB Created: 2021-04-11 20:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2611064b1b50b438e56c4a3dac3dddba SHA-1: b81c7a4b65686826a9f4fedc74a6bcad61e7a9a6 SHA-256: 295de870aa8895df96b2f80f4cccd3beee8bb107fc3e17d1e94c1235ea0ac678
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+take+the+top+off+a+maytag+bravos+mct+washer PDF link annotation
    • http://kompledom.com/samsung_air_conditioner_error_code_e472lmo7k.pdfIn PDF document text
    • http://dwatches.site/xewesikozuzogixos14d16.pdfIn PDF document text
    • http://rezotu.xyz/ordinal_and_cardinal_numbers_exercises_in_sentencesm14nr.pdfIn PDF document text
    • https://kegotewu.weebly.com/uploads/1/3/1/4/131437679/f1b6eecf.pdfIn PDF document text
    • http://mirror-x.org/temirokufitetuvixokepefomo6sg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_6046c48e45b39.pdfIn PDF document text
    • http://generatorsale.ru/sketchbook_free_download_windows_7nbyhi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_60224b7781480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_60344ef169d37.pdfIn PDF document text
    • http://shopyou.online/85262364055l18tt.pdfIn PDF document text
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/d34b1f.pdfIn PDF document text
    • http://x-bionic.shop/how_to_fix_water_leak_from_water_heaternfo65.pdfIn PDF document text
    • https://dezusopivelisuk.weebly.com/uploads/1/3/4/7/134734284/wevitusuviki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ffdecd472d78.pdfIn PDF document text
    • http://jadenefabive.iblogger.org/ability_test_questions_and_answers.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/1178073.pdfIn PDF document text
    • http://coolvdomaion.online/437941241034f5wz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_678454e83a624cc8aba5e349806acbbf.pdf?index=trueIn PDF document text
    • http://wurasegato.rf.gd/xovaresemanis.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_3cc1cf58c5b04327beb0d37e1122ce42.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_4a65af86b9674c1bbbcc017eb75f28fe.pdf?index=trueIn PDF document text
    • http://tasefabomodewiv.epizy.com/35711640084.pdfIn PDF document text
    • http://dupikupujetilu.rf.gd/61050870630.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_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 5816 bytes
SHA-256: 94449bcf6c6c24e694b64e7977ae9d0c572b09d773ca7554d0cccfd96954a4d8
font_01_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 11740 bytes
SHA-256: 8349ad6d799b6ebd446009d988aa00ded37413dea8af42f9b486fbcdd2dd456d

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