Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57765be802e44ed…

MALICIOUS

PDF

81.0 KB Created: 2021-04-21 15:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c00e908307aaf7a6cef2b52e7173d05c SHA-1: 1196addadf5aecdac31afce6cf85cdb7eaee8463 SHA-256: a57765be802e44ed7b3e0e22f2535dbc2c2b61e8ad921e6026111b51c3502e36
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 0.9997

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/strik?utm_term=honda+125cc+2+stroke+dirt+bikes+for+sale PDF link annotation
    • https://cdn.sqhk.co/temejikowewa/jdhasXf/survival_manual_example.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/Niaiehh/47566503640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tisikifapov.rf.gd/83922491455.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_c6a29132e7c44fb0aa6f1677ad6bf9fa.pdf?index=trueIn PDF document text
    • http://tiwojojerat.rf.gd/lasefaxelapefelav.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/77722647339.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_6ff5ada224634250bd316a18654ab3c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/kreepy_krauly_rx3_robotic_pool_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe87ad3-218d-44d6-8ea9-71ce8333d898/husky_1800_psi_pressure_washer_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4d7a70-b8d1-40c9-ba05-07fc38f72ec8/marvel_legendary_custom_dividers.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/rto_vehicle_information_rewa_mp.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/difficult_gk_questions_with_answers_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/does_netflix_have_regular_show.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/android_sdk_unity_linux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5a0a11-13ae-47e3-8e8c-791aa2b9a1f8/99638534259.pdfIn PDF document text
    • http://pafemex.rf.gd/71399532554.pdfIn PDF document text
    • http://mixawulemago.epizy.com/simple_modern_cv_template_word_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891f3da6-f740-4de3-939f-4ce8b1f3b266/nekalimimuxunasos.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_b0c2e6e356e040f1ba4f8f2df42ef7d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/3973221349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90f259e-da06-43a9-a1d1-00fc5f2b487e/lg_truesteam_front_load_washer_reviews.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_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 5488 bytes
SHA-256: eaec332d47a0116bb923e2078fb3444c9ee9c02e34860c9cad42e38246239751
font_01_sfnt_off000111c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C6 10912 bytes
SHA-256: 13918a59c79a0630fdf8eda9059856cd21fb69706627d04098d2eac84d60a0ca

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