Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f9ce7bd5a51f59…

MALICIOUS

PDF

82.4 KB Created: 2021-03-20 23:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2aeea72cdb3d91eb4f8c1b37b53b2b46 SHA-1: 86ab3de496d8f5ff3bbad932a5c8f0c59dc1d1e9 SHA-256: d1f9ce7bd5a51f59d0f674cb41eb7f1a263e1b2f7d52dcac6986220105c4f687
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 0.9991

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://bologen.ru/strik?utm_term=ap+style+photo+captions PDF link annotation
    • http://m-laskin.ru/duzujoponeteredupocww1a.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/7328912.pdfIn PDF document text
    • https://razejegunejedad.weebly.com/uploads/1/3/1/6/131636834/227c29.pdfIn PDF document text
    • https://bejelopaze.weebly.com/uploads/1/3/2/6/132682113/1100192.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/fezirimemogev-notalinamexa-zobimafi.pdfIn PDF document text
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/4d16982d4c2a321.pdfIn PDF document text
    • http://blog-millionaire.buzz/scout_and_guide_log_book_in_hindi0avbs.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/663208.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/213f8.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/1778238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/03858be3-c991-4666-bec7-17bcd2451ae2/vienna_chestnut_netherland_dwarf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53f8491-ce40-4a0b-8962-23755c8d659c/when_was_the_marlin_336_rc_made.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517bab2d-84b0-4254-8ca1-f9ffb16e6608/divergent_book_reading_order.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/kiterigawenuga.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/blast_furnace_details.pdfIn PDF document text
    • http://jutademopewe.epizy.com/lurujesusokujovopaduv.pdfIn PDF document text
    • http://kafopazam.epizy.com/mole_to_mole_ratio_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7cc14e-13d8-45cd-93f0-80287c7f6ae5/pride_and_prejudice_movie_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c0e7b3-a21b-4563-94e6-780c0e2dd0bf/what_type_of_fuel_for_briggs_and_stratton.pdfIn PDF document text
    • http://jozuwim.epizy.com/body_language_in_the_workplace.pdfIn PDF document text
    • http://jumezasaguruwu.epizy.com/remoxowexuviperiwazog.pdfIn PDF document text
    • http://lepetape.epizy.com/kazusile.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/31050873379.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 4804 bytes
SHA-256: 8f30a4044428f9c7c8ab4f8ca9d6932bc4f5b3b16f13f7a0a9d1b4ac7bb64b57
font_01_sfnt_off0001082c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082C 11152 bytes
SHA-256: 6dd297bdb9f7e2abdc14417a16bb8bcabdf7773c08bbfc551562c19dab2a8812
font_02_sfnt_off00012dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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