Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f7fb552eb296f6…

MALICIOUS

PDF

83.9 KB Created: 2021-03-31 08:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 428a650f23d3a63108e9384f505c63a8 SHA-1: 70246d6efcb2e37bfa2443733b270df5a3d0d4b9 SHA-256: 91f7fb552eb296f654bf3825402b7882e0466d9e96e2f1e45f997affbf84828f
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 0.9998

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://botokaw.ru/wix?keyword=deuce+hollywood+undead+instagram PDF link annotation
    • http://tradebot.space/louisiana_purchase_and_exploration_map_activity_answersmaejt.pdfIn PDF document text
    • http://maykistore.ru/android_broadcast_receiver_update_listviewzpvby.pdfIn PDF document text
    • http://infonewsuk.site/nostalgia_electrics_retro_snow_cone_makernbr1l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_6023ef6e76d6e.pdfIn PDF document text
    • http://a-trvl.ru/jipuzikawezutufelup7w67n.pdfIn PDF document text
    • http://vkysnaya-eda.site/betonefajuxow5ekd.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/how_to_count_number_of_words_in_a_column_in_excel.pdfIn PDF document text
    • http://zvezdasevera.online/phd_thesis_powerpoint_templatezvnr5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fe4d34dbe4ea.pdfIn PDF document text
    • http://eurofamily.pro/romances_sans_paroles_mendelssohnrix60.pdfIn PDF document text
    • http://znakomstva18x.site/how_to_sew_a_simple_face_mask_tutorialjs8sw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452382/normal_60016e7687d1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44da253c-5cbb-463a-8b2a-5264cd063e28/kadururogofuwi.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/fukabezedisolalobupaso.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/the_raven_method_dr.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/xovijipavuromerizoja.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/all_cfop_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/brownie_cellophane_wrapper_for_relative_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f78677-d205-4326-b6dd-0cba4dbec189/element_70_inch_tv_specs.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_off00010a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A66 5544 bytes
SHA-256: 07ab378737faf0fdb314c42db07d7224cb2c11f1b3e2715e4b19f712549a3adb
font_01_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 11128 bytes
SHA-256: 01826fb54013259573b75d45876bd3642b23f64690922d0e0527942ac5546e85

Open this report in the interactive analyzer, or submit your own file for analysis.