Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e0ba0d1b483f2a…

MALICIOUS

PDF

111.8 KB Created: 2021-03-14 10:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5ea418ca212496a3498bb0065146470 SHA-1: 93e2f6f6b71fb765b53f2b1a6c5e862f0a717266 SHA-256: e4e0ba0d1b483f2a75ebd0da332e5d4ff8963afe630f8fb68c8180678b1b8a52
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://jacksth.ru/123?utm_term=state+mandatory+sentencing+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403820/normal_602c665f6ae05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_600fabbc0a158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_5fe7e273005ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407316/normal_5feec3d03f332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_601bb31439c85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_5feb89efe6c29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_e29c1e6e8caf4e7caf6c947991a7c4f3.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_f5fc5ce37075451d9b2b41fbc7c3413a.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_65789d445771474791b0eeb4c38fffcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevowimo/which_is_the_best_k_cup_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/lungs_function_test_report.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_59ece80abd2e408baa55b63cb66e3426.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_3e311be8cef74e64ac30cbe6fd6d78ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/what_is_profile_elevation_mmpi_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/char_broil_electric_grill_parts.pdfIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_687ebc2379444561a8814f6a3301ac7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xetasif/criminal_law_reviewer_2019.pdfIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_0734f39a3bf04cbda5916d3747d5b164.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/372087145.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_e8c5a68f5d034229a8145b5f46907cdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/knock_me_off_my_feet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/wordly_wise_3000_book_5_answer_key_lesson_6.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_6fa0c83fbd06485c9f2e9013e0979933.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_03187b333bc845f683e05e2769126b6a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17637 5464 bytes
SHA-256: 45682c5a3301365cc2ff85f116a599532eb5d04d8f9ea8366042cc238bfaba8f
font_01_sfnt_off000188b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188B9 12216 bytes
SHA-256: 965b6f2c6cc11a5bf75ebe3ac8dd14387a82cae4234b8c1192ce17d1b4ce4128

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