Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8b61fbd18301f4…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 18:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c7117ec5bebe6a55a836024dc6b473d0 SHA-1: bed1a81afc8e4a30b7edc141c1ad7c8724312270 SHA-256: ff8b61fbd18301f46c814dccbb7b6ba79998897f2eba6eaa34c4cbbc88474514
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=pan+newsreader+mac PDF link annotation
    • http://kurixuj.sportsontheweb.net/white_horse_ceramic_tiles_catalogue.pdfIn PDF document text
    • http://zarabatyivat.ru/bios_instant_notes_in_genetics_free_downloadr2sk3.pdfIn PDF document text
    • http://mx50off.pro/favozodakirapenabovizogiuz6.pdfIn PDF document text
    • http://deflecfcvy.best/nordictrack_c800_ifit_treadmill1b8hj.pdfIn PDF document text
    • http://alcexpress3.xyz/where_are_worldedit_schematics_saved5pl3t.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/zodarakemaludazedevazakeudckz.pdfIn PDF document text
    • http://igcopyrightclient.com/alphabet_poems_azithromycin5xzdl.pdfIn PDF document text
    • http://ita-talia.fun/rexaluxixabozau3t65.pdfIn PDF document text
    • http://fly-drive.online/nawagerexeniwakizunagwt9b7.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/37357221296.pdfIn PDF document text
    • http://loveworld.club/31210666610shsil.pdfIn PDF document text
    • http://goodsun.fun/15052126292aj3c1.pdfIn PDF document text
    • http://akb54.ru/automotive_lighting_market_reportd08oq.pdfIn PDF document text
    • http://zarabotok.space/call_letter_for_job_formatnikpi.pdfIn PDF document text
    • http://getfreecreditreport.info/90308557495uv2bz.pdfIn PDF document text
    • http://1xbet-registrat.site/eduardo_kohn_how_forests_think_reviewme1tx.pdfIn PDF document text
    • http://instapriz365.site/873250888106r0e9.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/contrato_de_alquiler_de_vivienda_gratis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_1f3c5f7a577049fa89d21ce0e2a18e71.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_9e47d3485a7e4d7bba7fb185e8875dee.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_5b1a7622ce3c4eb2a31ea7fdcc122afe.pdf?index=trueIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_3f802d25a4fa4db1a362e885b30b2611.pdf?index=trueIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_5e9ff698226e4941b11bf3b27181957c.pdf?index=trueIn 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_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 5144 bytes
SHA-256: 7fe0d730dfbde9a27f6bb78de96daa2cebb7768f1ec47c81ffe3a0ab8e4ff776
font_01_sfnt_off0000fb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB48 10720 bytes
SHA-256: 1446a786e622f893b96b5dadbfaabf48307a95ecc278c25b84053202ee21ca7d

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