Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e005640f2080c51…

MALICIOUS

PDF

76.5 KB Created: 2021-04-04 03:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bfb29cef8ef45623da9c27883c5a449c SHA-1: 2001a4beee423e4ed7b14ba82917cf8e8d76836e SHA-256: 3e005640f2080c51aeba7c0f74493198c2ecfa0b3cbd67b863d5c97d9a872405
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, identified as a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://golowaki.ru/wix?keyword=speed+velocity+and+acceleration+calculations+worksheet+answers PDF link annotation
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/fedimixavilirade.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/fusubekadawozaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_604a4c2f18233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_604180936f708.pdfIn PDF document text
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/zakafujijebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_6068ea3d76212.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/5610020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5fd7d1dc90c2c.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/kogukizoxate_kuduwidixurada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415937/normal_5ff5ccc41d311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_602555b9af599.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/legenapi/41429887777.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/online_editor_free_reddit.pdfIn PDF document text
    • http://luvibiw.epizy.com/free_handwriting_fonts_worksheets.pdfIn PDF document text
    • http://vepimenazipo.rf.gd/46413210669.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/14506753161.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/interesting_trivia_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/78471372112.pdfIn PDF document text
    • http://xedaripa.epizy.com/new_hollywood_movies_2016_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/8453895017.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/texasekudosezu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/36888631003.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/puroduxevetaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/vegixujano.pdfIn PDF document text
    • http://palipesokugukux.epizy.com/kiworedazagow.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_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 5464 bytes
SHA-256: 94ea460d718f5bb8007abbe2f03fe1169e6002b3eda7da93f283050d7f5f2ca3
font_01_sfnt_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 10132 bytes
SHA-256: 54096f35e8e1d8f181daa147c88da6aebb2daed47a7aa2cee072ee59f1d0dc91
font_02_sfnt_off0001151e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34