Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d1649b9995a7b2…

MALICIOUS

PDF

78.2 KB Created: 2021-03-23 11:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b517a33b35d252990fdaa8bfaf450689 SHA-1: dfd20a710e63ed1245decba13e73021c99cfa9cf SHA-256: c6d1649b9995a7b2fd2d283ded4d3e9862056b34f9001e15857cb3ad5bc631ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on directing users to 'baarspo.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Dragon story eggs breeding' to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=dragon+story+eggs+breeding+guide+time+chart+list PDF link annotation
    • https://cdn.sqhk.co/doparibi/eigjjjf/25646444477.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/hgjjEib/very_loud_ringtones_for_cell_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcda6ffd2afc.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/jiOlUBZ/41132045725.pdfIn PDF document text
    • http://nesakud.mypressonline.com/witcher_books_vs_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5ff281351a036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fc79cca28919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_6010c9c60b854.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/ihOOs1x/1147990308.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/ali_baba_and_the_forty_thieves_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/ggkyDgg/74228949215.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/penale/kubige.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_d2b49fbe1fe54b68b00ac18464fdc604.pdf?index=trueIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_e583090d6db949dba4a93530f7d222ed.pdf?index=trueIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_74365de98ec14ac5809d27767710fde0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/is_procreate_pocket_a_one_time_purchase.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/93536480635.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/easy_flat_belly_diet_plan.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_a3e5e7362f9045a39b0c1abe05b4ecde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/contract_template_for_web_designers.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_a834de9054974a8e8547edcdad3b2f79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mijumomub/excel_2010_delete_sheet_greyed_out.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_457bc3b5324042fead0ba9782f4e542d.pdf?index=trueIn 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_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 5592 bytes
SHA-256: 631077050567b260a9372328d60f328d5925112968121ace3f25aacfe85a3df8
font_01_sfnt_off0001069b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069B 10764 bytes
SHA-256: b9dd17b3d11999946f91b9cdf950f622ea40b2556444bf4ffeb1a88de47776af

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