Malicious PDF — malware analysis report

Static analysis result for SHA-256 272974fb64cb4bc2…

MALICIOUS

PDF

79.7 KB Created: 2021-03-18 03:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f95fed0b229d8794bbfd0ff59c55215 SHA-1: ea313279b5a70f0f6e8fe2410f2b08b92567ff2e SHA-256: 272974fb64cb4bc2915b8b8bc8ef7670ec2cc11639df8bdc96dc219b552ba22c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://resalured.ru/wix?keyword=latale+w+mobile+guide PDF link annotation
    • https://cdn.sqhk.co/rarukaboz/ifujfkb/bexutijujemotekipakamafid.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/cKDOqjj/cthulhu_realms_expansion.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/iieU5id/sowapusorojopemo.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/fjgifc8/dead_eyes_like_a_doll_s_eyes_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/hc4lhfN/block_breaker_3_game_free_download.pdfIn 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/e8ea6cf0-b6ea-4fb1-b196-252f5bdac1c3/super_brain_level_24_books.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/chrome_os_android_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31aa4ce-6910-4ac2-ad64-0dfae4a856bc/how_true_is_the_irishman.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/manualidad_globo_aerosttico_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59531092-722f-42c7-b7ea-1c5f47b76c08/zesebarekadew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca64d86c-d41a-499c-a364-139874e36dce/cido_bromhdrico_frmula_y_nomenclatura.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/kagifufovarux.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/craftsman_router_315.174_parts.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_9d940abb28f846a1a116efe5f253ec0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb92768-6769-4258-b81b-4e75067c5d95/20691441762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1c6914-f16e-4c00-b98b-4cd592a7aa28/125cc_pit_bike_vs_dirt_bike.pdfIn PDF document text
    • https://2978fa49-077f-489e-bef2-0e177375ffd3.filesusr.com/ugd/50ba8f_db0ba7bd3f3d4e9f8620e62e9889fb48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokelur/zejadilisi.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/what_kind_of_specials_does_taco_bell_have_right_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d997df4d-6d24-426c-add5-d36c575f060b/what_does_mundo_mean_in_other_languages.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_fbaffbe483594f0bbf2525563da09e4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/zatafab.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/14132395385.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_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 5044 bytes
SHA-256: 5dc6b37bb9ada64eac7e2b5719bd19c35b144a4865995edd1c2b5cadf15cdf75
font_01_sfnt_off00010a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A94 11320 bytes
SHA-256: be21931f5ff3323618b95c2ba4fe6684d36a584d7413f31c57bd8f8fe673b273

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