Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e58841ec34fdf7d…

MALICIOUS

PDF

75.8 KB Created: 2021-03-14 08:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b52c610cda4965e70085d1e2834be60 SHA-1: 187c9eaa561a289cf0c5fc2e890ea6e1ee4b78a5 SHA-256: 8e58841ec34fdf7d7ecc9aff5d219090c75c6ebc6b441ec8346f6ac8c86521f0
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-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://vilenefex.ru/wix?keyword=honeywell+6160+security+system+manual PDF link annotation
    • http://bitoxifa.sportsontheweb.net/neil_degrasse_tyson_tv_show_on_fox.pdfIn PDF document text
    • http://manovina.mypressonline.com/81421429397.pdfIn PDF document text
    • http://tonobipuko.iblogger.org/fatca_crs_reporting_requirements.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_b1e18d4db6014b8db38c9e1ef80259cd.pdf?index=trueIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_0ae4c4bface24d2999fbdfa22d32ae38.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_b33562d926e446409a4355cc48060800.pdf?index=trueIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_6f900fdd304549e58fadb1f7c081fce0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/what_does_apple_of_gods_eye_mean.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/97447159570.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/convince_me_meme_template.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_17146652ef354ceaaecb0e6091d246bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mutirexa/alliant_powder_load_data_224_valkyrie.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/white_cotton_fitted_sheet_160_x_200.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/free_fortune_telling_yes_no_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/12540003029.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_0a82e953acd14fea9e359b78f9c239c8.pdf?index=trueIn PDF document text
    • http://kalilom.epizy.com/timadujus.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_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 5448 bytes
SHA-256: b8ffb83abba8a24ebf8afd03894f38ceefac370146704aca9c4849796800b3aa
font_01_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 11100 bytes
SHA-256: 33d3aa85aae5912ca54849d9e65de216855f745f46e1f81c2f9cdfb1f3c13c94

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