Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb04251527790fe1…

MALICIOUS

PDF

80.4 KB Created: 2021-04-06 19:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 264a660439913bf876a5bdfd582969e3 SHA-1: 1552fab4dcca0b2ed3ba9dfa2cb4d3c3c7ef443f SHA-256: eb04251527790fe145f19a754e2f115bdd334fcbe7f036fc7158b173d1adbb8f
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 0.9991

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://resalured.ru/wix?keyword=farewell+speech+given+by+students+to+teacher+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383917/normal_6056e69f29834.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/zuxon.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/62311679171.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/aroogas_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_6001a20b09fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_6041aa088a967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_602096739c766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_5ffa11aad96d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobito/consultation_form_beauty_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655263c3-72e9-4e55-8245-1ee61d8cffce/rabif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcbc543-8719-4869-b059-c2537674ec62/9911466760.pdfIn PDF document text
    • http://zesugipove.onlinewebshop.net/statistics_and_chemometrics_for_analytical_chemistry_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c00e4b-007c-42a4-9a05-895bf92b008d/g_shock_mudman_army_green.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/how_to_pair_remote_to_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3687fd86-653f-44da-93dd-b876f7d911c3/soccer_fitness_training_at_home.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/77739838090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d17657a-c595-4621-a8f3-eb89ae3acd26/bowflex_pr3000_for_sale_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/sheet_metal_part_in_solidworks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305eeb60-10d2-4a82-884b-f267bebb8ae5/reflexive_verb_exercises_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f8f730-9701-418f-b66b-1f340962b107/55586614623.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/ff14_crafting_guide_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013c0e9b-91ae-4b80-b58d-05d3a415a744/snapper_rear_engine_rider_safety_switches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296c8cc2-2ad2-432a-913a-30327cce85cf/91258939528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a376ea7-0d0a-413e-86c9-31dc1f4f2c7d/23661483920.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_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 5684 bytes
SHA-256: 0c0967e9882c203cde516729f1e8aea994ee446750c312101051003dd7b350c3
font_01_sfnt_off00010fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 10340 bytes
SHA-256: f827c186c08f607c242ebedcf07c60c9c62524f55e321a3cbd457d9728c74ac5