Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d827df34995f129…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 03:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 540d69bbad0c9dca9edefc3e592e86c4 SHA-1: cd0217094f85151fd7f5d9da5e4d5e91cec9c7b7 SHA-256: 8d827df34995f12908b6c11e7b3a4f172572ca85d8265580535c0a6186741039
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an invoice-themed lure. 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 0.9991

Heuristics 6

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=how+to+make+3+easy+paper+planes PDF link annotation
    • http://world-wildshop.com/romeo_and_juliet_book_vs_movie_1996tbp15.pdfIn PDF document text
    • http://grizhoff.ru/surgical_anatomy_of_pancreas5qrfm.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/calcutta_high_court_case_status_informationboo0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_603454dfb2409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_6035ab5029896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_60200c03ef41c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_603543aa06128.pdfIn PDF document text
    • http://powerpoint4you.ru/shooting_an_elephant_george_orwell8m6lm.pdfIn PDF document text
    • http://zupinuxuxodu.iblogger.org/xekarasemesamusirodebat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benuka/lubafukajepevinum.pdfIn PDF document text
    • http://sabuxixu.epizy.com/9585693574.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_1ea25bcbf83742c2bc826d56e75d1bb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minabiwa/nubinaba.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/82553824620.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/30232344479.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_09faa26aa7a0441ca4538ccad0de4407.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajuse/sunopozebu.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/bound_by_flame_trophy_guide_ps4.pdfIn PDF document text
    • http://nixevafuzija.epizy.com/what_is_the_difference_between_left_and_right_handed_golf_clubs.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_d8b0ee98ad3a4068b6cfdb591723ad3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/vanity_fair_factory_outlet_dartmouth_ma.pdfIn PDF document text
    • http://biwewija.rf.gd/monthly_expense_report_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/how_to_evaluate_a_book_of_business.pdfIn PDF document text
    • http://mewizokefa.rf.gd/factory_reset_xiaomi_android_one.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 5348 bytes
SHA-256: e49981c6a3ec3e7bac2ab044f163c2952cffc37a419863d92037f42c45c3c98d
font_01_sfnt_off00010130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10130 11040 bytes
SHA-256: 0cf8ee7f40e106f5177e66d7a03f73575c470797cfe3dbb735958d9e02f5fc4b

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