Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f11a910e839b77…

MALICIOUS

PDF

83.0 KB Created: 2021-03-10 01:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f6a1c745a8273c741e60b23f13760c30 SHA-1: db176df8254933a3d853b6064d793601500f4d23 SHA-256: 59f11a910e839b7707be6e960d93ffe122b0099bc5f24615ff788447213e1672
126 Risk Score

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 0.9950

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://baarspo.ru/wix?keyword=taylor+goldblatt+parents PDF link annotation
    • http://tadosuzewamu.medianewsonline.com/jomudawo.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/clinical_anesthesia_morgan.pdfIn PDF document text
    • http://pokovata.scienceontheweb.net/clasificacion_de_los_animales_segun_su_habitat.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/fagatobo.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/blheli_30a_esc_programming.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/rukow.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/23035193889.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/63590368685.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/sakimipelivudasujozifup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/63332942247.pdfIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_251e89df47044d29b4895133219f87ae.pdf?index=trueIn PDF document text
    • http://fazaburifug.myartsonline.com/ordained_minister_wedding_ceremony_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29392009-26b5-4d28-a6e3-04919ed25fcf/what_to_eat_for_muscle_gain_vegetarian.pdfIn PDF document text
    • http://todizugofufufax.epizy.com/37199948738.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_b067a52e4f784d38aa023841d6a596f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/067504b1-778e-4805-b897-ebec78146b41/pikatawu.pdfIn PDF document text
    • http://wonopotixofat.rf.gd/36635349589.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/60032417022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b756ce0c-97ea-43bd-a5ff-3a85792be9df/how_to_prepare_mini_bundt_pans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d551ac99-20a7-46bb-9cce-b9f59f3b4128/poulan_pro_blower_carb_rebuild_kit.pdfIn PDF document text
    • http://bijipav.rf.gd/21440536357.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_0a5f4bbfb7a44c8389aa0ad7efa9d994.pdf?index=trueIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_7c8fb38c832548b8ab8d21a6474c7492.pdf?index=trueIn PDF document text
    • http://bujijawuta.atwebpages.com/hallelujah_song_chords_piano.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/staples_one_touch_stapler_wont_open.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_c09da70281f548759a5bb879126b4ed8.pdf?index=trueIn PDF document text
    • http://bixerexexotepe.rf.gd/english_textbook_for_class_10_ncert.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 5316 bytes
SHA-256: 8ab658d21b037be5bc7291e75c517481cccdb1e6306976c8942ec83610e960e4
font_01_sfnt_off00010431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 10536 bytes
SHA-256: 9fb74e29b775b42626ad26cb54b2f55d19f22aa42719ace9aa0fc47633acb958
font_02_sfnt_off0001287c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287C 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15