Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5f3b476d51a1bc…

MALICIOUS

PDF

71.2 KB Created: 2021-02-16 03:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 12848d2a40782efdc39e2e8525186174 SHA-1: 2711c63ae47ff165fe2adc4b13195762989a005f SHA-256: 7b5f3b476d51a1bc44f0260447d3ae012d1eae8ff3c257a5254e9577fb6fcdca
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=earth%2527s+layers+foldable+notes' and 'http://marafonsport.site/71520328125eoonu.pdf', are likely part of a link farm designed to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=earth%2527s+layers+foldable+notes PDF link annotation
    • http://marafonsport.site/71520328125eoonu.pdfIn PDF document text
    • http://milano-moda.space/practice_masters_level_b_answers6w050.pdfIn PDF document text
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/5666682.pdfIn PDF document text
    • http://grinallex.shop/download_game_parkour_flight_mod_apk0xhya.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/8f9d5991e03a60.pdfIn PDF document text
    • https://gipumoku.weebly.com/uploads/1/3/4/7/134710759/rolokupu_rexunazovigek.pdfIn PDF document text
    • http://weinmvc.net/kavanomivasitizijetipu04ibf.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/skoog_analytical_chemistry_solutionsex7sg.pdfIn PDF document text
    • https://zurokexotuv.weebly.com/uploads/1/3/1/3/131384071/30ce93400105a8.pdfIn PDF document text
    • http://ecosbor.net/excel_vba_activesheet._codename57s0g.pdfIn PDF document text
    • http://reform-st.ru/3568104120u2via.pdfIn PDF document text
    • http://goossyy.online/ge_carescape_v100_operators_manualn2tqz.pdfIn PDF document text
    • http://gratoramaa.space/rovatuloboxenurokijabxpqdg.pdfIn PDF document text
    • http://monoga.space/855029749616io32.pdfIn PDF document text
    • http://bitcoins-profits.com/bejusumuw9xgw.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/guvovigo/messenger_facebook_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/sifagezoguxapip.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/16757915458.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/14233724312.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/82172169307.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/31416295125.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_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 5228 bytes
SHA-256: 41bd576c988d6e6dc86edf11a7110106cd0c38955b6183c243b8a0f1b8aaa089
font_01_sfnt_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 9844 bytes
SHA-256: 456e66a74bf9250f545becfd5737923d06da7f0111c41ae807501f19dcba2e42

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