Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb32d4b2279ae7b2…

MALICIOUS

PDF

101.3 KB Created: 2021-03-19 03:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 79869345c062b15c207ee730923d49b5 SHA-1: 9f72fbdbaf5cf97996c57c842e1b706fb93e9704 SHA-256: eb32d4b2279ae7b2239666821cdf799ead885905b066d43460b60022fe5d79c1
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a malicious intent to distribute further malicious content or redirect users. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7311

Heuristics 4

  • 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
  • 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/award?keyword=best+company+profile+presentation+pdf PDF link annotation
    • https://newogofifexepe.weebly.com/uploads/1/3/4/8/134884114/3540761.pdfIn PDF document text
    • https://serinuvof.weebly.com/uploads/1/3/3/9/133997237/9988569.pdfIn PDF document text
    • http://ruxipivufaditij.22web.org/general_mathematics_10th_class.pdfIn PDF document text
    • http://opensucre.pro/kawolodoruzamaxesagekenpnoqi.pdfIn PDF document text
    • http://axacheat4.xyz/sobizasobuvaju2xlxu.pdfIn PDF document text
    • http://pl50off.info/graphic_designer_portfolio_templates_free_downloado8a6m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3176b267-bbe5-4bd0-8a48-85fd75e6e2e0/how_to_read_geologic_cross_sections.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dd634a-9521-462d-8228-4f4adef91176/margin_of_safety_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/jinufesavizur.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/story_robert_mckee_baixar.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/osha_forklift_certification_training_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/dlink_camera_blinking_orange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b610412f-21e7-460e-b2bb-be9a1406a737/savenesojerazoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/hive_orc_vs_parquet_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/24024753453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a34ce7-0464-48e4-89e3-d47c5d280dc2/19836733888.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/mowagufanazapulinoxudege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c87dbd1-193e-4ac5-9fce-f6ef53f7cb98/in_the_heights_movie_uk_release.pdfIn PDF document text
    • http://zezazemana.epizy.com/3_digit_addition_no_regrouping_free_worksheets.pdfIn 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_off00015759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15759 5240 bytes
SHA-256: e3d38cf2a7515cf39ea61f804827926e8b6a1c999e5ea0636b1695c5bf2cdd33
font_01_sfnt_off0001690a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1690A 11024 bytes
SHA-256: 71b3a310bc2a3182d69756259df96b394268bba8e1828dd6c33a07955cd13c65

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