Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f4d8794474df9a…

MALICIOUS

PDF

89.0 KB Created: 2021-03-31 01:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8ec2eab272fdd8710d859a063d4f9db2 SHA-1: 59155b71fe9a504df330167de52e1987767d4423 SHA-256: 26f4d8794474df9af1916e2a89896c0b4267fbfb1056c35494f18d8db77c1f19
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 0.9996

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 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://kuzutuzo.ru/123?utm_term=another+eden+tower+of+time+boss+guide PDF link annotation
    • http://autolombardpro.ru/organizations_that_donate_furniture_to_schoolstxarw.pdfIn PDF document text
    • http://francobusiness.com/jelifabujuroxeel6r3.pdfIn PDF document text
    • http://kamini33.ru/190268003793udww.pdfIn PDF document text
    • http://acupofjacob.com/powerpoint_template_for_finance_presentation_freekq94w.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/75459182327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/ism_cubs_and_bulbuls_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/algonquin_provincial_park_guided_canoe_trips.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/dakomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d12cedc-3ce7-46c5-98d9-1495c07acc10/how_to_do_a_factory_reset_from_command_prompt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b9f5406-30a9-4cde-ab01-97716efbb3a3/gikojokusujikukejili.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_6ba0733d1ded4660a6094321cde933cf.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_9e8ab71a05b145ab93b11ddf75f9c158.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/minimalist_logo_quiz_answers.pdfIn PDF document text
    • https://fad8e652-f2ae-45e9-bc2c-f9a63ff8ed8c.filesusr.com/ugd/78c764_1a7bd16676a64df19cc1803614e60388.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lerezazo/verezepowawes.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_248f4b3930da4ec283c73d907ff1fa21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/rheumatoid_arthritis_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4db0aa-3b3c-43b2-9af2-3e3c6266ab24/69880252007.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/78292769222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c6c513-1b7c-4fb5-bdd1-a95c1690863f/nikogosefarubila.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/codepipeline_cloudformation_template_configuration.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11128 5184 bytes
SHA-256: e249f8bbd94256081e134f694f18662bf183bf953987c10338eab5550ef70f44
font_01_sfnt_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 11080 bytes
SHA-256: 115cbd17dc94e6335eb7b738e9fc54ed4384aac18636b37b387054841fcb9354
font_02_sfnt_off00014872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14872 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.