Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2cd68bfc4a937b5…

MALICIOUS

PDF

83.4 KB Created: 2021-03-24 02:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de4a24dfa8e5557f47af628f7d91e4f1 SHA-1: 9804f19ed95d99f0b499703e4661090e1b227162 SHA-256: f2cd68bfc4a937b51f801a14fc1fe4bedb97b5b60297a7569e37af30175432c5
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 0.9997

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://kuzutuzo.ru/strik?utm_term=towards+the+firmament+ffxiv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fe3e24eb2c3f.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/aT2ONia/ant_farm_cast_now_and_then.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_6057a89bed003.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/0jaPgjv/nemize.pdfIn PDF document text
    • http://mezapadanufelon.iblogger.org/95952724203.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/fjhjcnS/escape_the_room_games_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379485/normal_5ffb6a753c495.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/dhahiio/93105550419.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/timeziso/star_munchkin_2_card_list.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_80c92e5e7fe548a6987fb63aaaea7748.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/gotaninopolonuvisexal.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/android_games_apk_app.pdfIn PDF document text
    • http://tudaxagobex.rf.gd/how_to_write_self_appraisal_for_teachers.pdfIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_b57a93f758eb4fedb8c74f09b45cb3d6.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_484de7685a9d42c3b6805c3a1b132c94.pdf?index=trueIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_5ee2bbbf0e8b43e0b1664d9a348f017d.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_cbe47b927d3440fd87524375d8ef0da7.pdf?index=trueIn PDF document text
    • http://pidulenumasan.epizy.com/html_tags_free_download.pdfIn PDF document text
    • https://3c31dc6e-14a3-4e60-a373-897e90814001.filesusr.com/ugd/9e17d8_fbe0b2d6e87e40afac19fc7b0427673e.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_05b544371f49483e8870e4fb40df77ab.pdf?index=trueIn PDF document text
    • http://wesokukukidi.epizy.com/38202074478.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_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 5284 bytes
SHA-256: a58bb9b8925b58e035fb07f85ad1d33f8e8ecf0f941e6d5d9de29bb1c7f06f98
font_01_sfnt_off00011b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B40 11116 bytes
SHA-256: 918f52f3f81106cc15c8a5f6da094376cc4a59648dfa3f4e3efb5d171d324bde

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