Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d83446e19a3990…

MALICIOUS

PDF

74.4 KB Created: 2021-04-03 03:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8fd99686d00418f3033285a8eb4b3606 SHA-1: 1d9690943047f79373915c3ffb6bba13b0cbe1f5 SHA-256: 13d83446e19a3990c858c28c741d2413bf8787bfe4b4df42c626b4e794a88453
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://xajibur.ru/award?keyword=approved+document+m+pdf PDF link annotation
    • http://tokigarodam.22web.org/giroxeta.pdfIn PDF document text
    • http://gakujimogudap.22web.org/bajrangi_bhaijaan_movie_filmyzilla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_6052b596ae73a.pdfIn PDF document text
    • http://oficialshoes.site/rarodijukujapokuxovununeci4pr.pdfIn PDF document text
    • http://weraka.online/45674417526yzxst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_60464bb084e78.pdfIn PDF document text
    • http://tvoyoproc.fun/16519484217cqqvb.pdfIn PDF document text
    • http://pomirkapa.site/92121142775a3jam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_600a9a4dcef0f.pdfIn PDF document text
    • http://psylath.com/supupazanatexisepil05.pdfIn PDF document text
    • http://huaweistoreukr.xyz/91157229812kpuus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_6011b5c3e610b.pdfIn PDF document text
    • http://itdiscounts.info/meaning_of_embedded_in_computer_sciencehxn3l.pdfIn PDF document text
    • http://peuly.xyz/powaletigaselinin5zctd.pdfIn PDF document text
    • http://vehicleusains.com/bohemian_rhapsody_piano_notes_free3ld8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_603978a1cd309.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duximepameme.epizy.com/traductor_ingles_espaol_gratis_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/android_phones_vs_iphone_market_share.pdfIn PDF document text
    • http://tiliwadovi.epizy.com/baul_song_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/avery_weigh-tronix_640_parts.pdfIn PDF document text
    • http://luloxefisamo.rf.gd/every_single_piece_of_information_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/46314690479.pdfIn PDF document text
    • http://tuwuxadifire.rf.gd/pokerstars_youtube_2020.pdfIn PDF document text
    • http://rokosarod.rf.gd/how_much_does_family_dollar_store_managers_make.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_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 4928 bytes
SHA-256: f81201602efba8e0600ea63d21a3cb72d944414676355cd3ddabd1202f415fdb
font_01_sfnt_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 10788 bytes
SHA-256: 3481e706440152458a6a42b6932613338e44cdcecb883b5c23c3e22948c3865c

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