Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77c57d5cb5d40a1…

MALICIOUS

PDF

94.5 KB Created: 2021-03-09 02:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fc7bb8135ffcc27b32fcf293077e7214 SHA-1: 140afb4d5bfedaa127ea43aa7929e872261c5941 SHA-256: f77c57d5cb5d40a100733788760e56a60fbda57c6204486fde6d389995f6b568
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 0.9996

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://maypoin.ru/123?utm_term=aaj+mere+piya+ghar+aavenge+free PDF link annotation
    • http://1xbet-regi.site/castle_of_illusion_starring_mickey_mouse_sega_genesismhdyl.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/70876694357.pdfIn PDF document text
    • http://hihikane.space/how_to_bake_in_a_presto_electric_skillet11zzb.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/fogodununejiwakexovox.pdfIn PDF document text
    • http://dipewafotowagu.22web.org/roketetelaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/ia23iii/42438094122.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/HDghgj1/singing_machine_karaoke_machine_app.pdfIn PDF document text
    • http://electrumwallet.buzz/7629165342k8som.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/navy_seal_basic_training_length.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/gj7ha0n/tadonafovagemezobi.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/how_do_i_know_if_my_cpap_humidifier_is_working.pdfIn PDF document text
    • http://i12tws.website/android_app_emulator_windows_8._1byihe.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/002059e1-b1db-48ce-8802-f7348c125ae8/xonekefuleruvibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1a76c9-25cf-4891-8a35-0737c86d2fca/surufomivukupo.pdfIn PDF document text
    • http://jobagivojik.rf.gd/cdsco_adverse_drug_reaction_reporting_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5729fa-415e-4fbc-8dbf-943d15eacca5/22947231747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ecc3114-6b44-4599-9dfe-620ab063ad08/dnd_5e_sheep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2a13c6-e581-4db5-91b1-55669dc6af05/29357305954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac4ddd8-bc12-46d7-87c0-00d5ee8e75c0/html_and_css_design_and_build_websites_kindle.pdfIn PDF document text
    • http://tigaxulajaju.epizy.com/rg400_coaxial_cable_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9406fd-3fc7-4570-8f60-e7f6aa455a57/gramatica_ingles_principiantes.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00011dbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11DBB 14188 bytes
SHA-256: e48684fb1318e3961c0bbae63ac83f8a691335b1714518fffbfb033fde3f2d85
font_00_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 5332 bytes
SHA-256: b4f80a04d98284b51c98caffa13e849d226c54319f2c53c17a0db971b495734c
font_02_sfnt_off00014585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14585 11504 bytes
SHA-256: f5dc7e055e84c804a46ab86cff7ebd56af70d79e235373922d16af63033ffd97

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