Malicious PDF — malware analysis report

Static analysis result for SHA-256 407dfe3a55a5850b…

MALICIOUS

PDF

85.5 KB Created: 2021-03-16 08:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 20bafcf3158608ba0cef59c7a88b0094 SHA-1: 27d2f5fe406d1b21d55c9f31d904d088a8510d94 SHA-256: 407dfe3a55a5850bffee96ea5aea02ae2995de3f96a1f9b82953cc8a950986e9
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 0.9994

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://ponafet.ru/123?utm_term=horseware+amigo+evolution+fly+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474191/normal_60018ab8b81b1.pdfIn PDF document text
    • http://jivizebunov.22web.org/glacier_bay_kitchen_faucet_mounting_hardware.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412415/normal_5ff0f7d1d5544.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5ff38f2e816f9.pdfIn PDF document text
    • https://cdn.sqhk.co/pipugisoveku/jhJZcmZ/radhika_dj_song_com.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/zygjgeE/is_alton_towers_open_on_boxing_day.pdfIn PDF document text
    • https://cdn.sqhk.co/xaleteser/hZmiegi/6099433923.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/bjjhLij/bixadu.pdfIn PDF document text
    • https://cdn.sqhk.co/wipabamof/hiwvhe3/6577761503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_602b7f45c9f09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_e429d3cf99f44b7781c0e7231a132aec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/comment_acceder_a_icloud_drive_depuis_android.pdfIn PDF document text
    • http://rebefagor.epizy.com/how_to_hook_up_a_deltran_battery_tender.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_33ac309ed15445d6bebff09b8c61144a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/rocket_chat_android_video_call.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_7c3509aa445c482faee84576e329d036.pdf?index=trueIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_4f78560eea544de89dbc4acafcd68954.pdf?index=trueIn PDF document text
    • http://lofetumavigasi.epizy.com/41315196466.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/cavalli_bed_sheets.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_d5651e4ebc5b47719e8f03ea1859c568.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/wuzilepisiku.pdfIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_d2f28385609641a7b2648e7bde14d877.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/chamberlain_clicker_keypad_manual.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_off00010d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D03 5396 bytes
SHA-256: edd7b11ab087550bd5af54e5c1958026bafea603232ac0450920a002dfa3a2c3
font_01_sfnt_off00011f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4E 11620 bytes
SHA-256: 17884c259c848eae4de752560e2df0ccc6156e8f73db2bfd09843f153ffc4490

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