Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c2bf9d2454394d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-28 10:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eb107080e496754b50f7a16c96161cd2 SHA-1: 70697a02756079ed9aae2fe088d42a7d98050bcc SHA-256: 62c2bf9d2454394d1da81cb1b63222206ef1e205eb825e41c3984b3d83861752
156 Risk Score

Malware Insights

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

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 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/123?utm_term=tamil+love+feeling+songs++video PDF link annotation
    • http://galosidijixiwu.mypressonline.com/research_articles_on_educational_leadership.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420911/normal_60515cb93f92b.pdfIn PDF document text
    • http://dududuw.mypressonline.com/how_to_program_logitech_harmony_520_remote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_60571e0a00572.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/magic_tree_house_merlin_missions_book_level.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/continuity_equation_in_cylindrical_coordinates.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/gomakobez/53598276716.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/analytical_biochemistry_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/53686112710.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/perdona_si_te_llamo_amor_2008_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/sheep_heart_dissection_worksheet_answers.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_b2a7d429a72f498080396ac17f05392b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/66376889288.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/algebraic_equations_test.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/fimikupiwotitu.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_f7fbc09adfa64b8ab9df4600f1103ae1.pdf?index=trueIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_ff72999fe9884ad083c693a23b2c8412.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/how_to_do_the_shrine_quest_trial_of_the_labyrinth.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_95d66cb9c051420981e890d4ad97b119.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/facebook_page_templates_for_business.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/synopsis_presentation_format_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/catur_online_terbaik_di_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/sharp_carousel_r1881lsy_convection_microwave_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/gekavabisupipafa.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_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 5140 bytes
SHA-256: f8f76508acba5679966af6179449178a7ebe1af061f29dbf67c158a845531d28
font_01_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 11376 bytes
SHA-256: 3837c456151853afc4eba602db1bb3cc0a9724c875a986fe627e9af2774382df