Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ab36dccb2a1795…

MALICIOUS

PDF

66.8 KB Created: 2021-04-03 05:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ceee855495e151d496a426a1b01e7dfe SHA-1: 53cebc60af18b39c510c80374001765a929747c7 SHA-256: 19ab36dccb2a1795745212f888389845978ca3a978476a74182ba3d1ed0261df
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 0.9998

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 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://maypoin.ru/wix?keyword=journeys+practice+book+4th+grade PDF link annotation
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/3857822.pdfIn PDF document text
    • http://xutuvulamarav.iblogger.org/93197412305.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/5095638.pdfIn PDF document text
    • http://winoraama.site/mystical_agriculture_guide8s9b5.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/7153120.pdfIn PDF document text
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/wisoj.pdfIn PDF document text
    • http://tisapim.iblogger.org/46430458451.pdfIn PDF document text
    • http://iuts.space/bright_starts_swing_assemblyv716e.pdfIn PDF document text
    • http://wide-take.top/gojoxifabizubwip7i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_d77081f23f65478f94e5140a025f752b.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_8a8e154c0c3c40deb8eea718065897a1.pdf?index=trueIn PDF document text
    • http://noroved.myartsonline.com/capital_de_giro_e_anlise_das_demonstraes_financeiras_unopar.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/64840117401.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/describe_the_setting_of_a_day_in_the_country.pdfIn PDF document text
    • http://jowosos.myartsonline.com/70993453193.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/sap_financial_accounting_tutorial.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_08061a144ed54ab9b1d021caf55a15a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/gudazologabajamixeki.pdfIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_580cb572319c4949aeaa7216efafbf30.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 5688 bytes
SHA-256: abf586c05157723f6890bc09b4505bec6ab28d8cdbc0dff30fd2d8e82c00c488
font_01_sfnt_off0000dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 10192 bytes
SHA-256: f7dc52dd7ec9eb27f8af28fdf334cf959917574f748baae76fbc74d925a1a59d

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