Malicious PDF — malware analysis report

Static analysis result for SHA-256 55364bea03022b9f…

MALICIOUS

PDF

84.2 KB Created: 2021-04-02 14:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1e97d545a732f2bdab26066eb92ffc3a SHA-1: 71336b883751cd43b37589160d1f934eaece4f97 SHA-256: 55364bea03022b9f5c2ed810c8f0c3830db42c3fbdee557a65101882a1f20e72
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 0.9995

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://lozipotod.ru/strik?utm_term=php+for+beginners+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/sevigexew/bzBMbYE/3689167917.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/hjW3jjA/15352608207.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/UHMgjic/16688448202.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/ifmmhdn/fuvijuxibilomeliguruve.pdfIn PDF document text
    • https://cdn.sqhk.co/wivenute/jnrejiQ/85488965039.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/pwhjLiR/urge_overkill_band_members.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/iaBDib0/42425221471.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/dheiggg/build_my_life_sheet_music_in_d.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/lWghMjc/snake_river_farms_steakhouse_method.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://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_b769de958eb64155a8f7bb07b9bdba76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxapoz/the_lion_king_movie_english_subtitles.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_b6d4f8430b784cd6a1050fff4d60782a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_to_change_battery_in_honeywell_lyric_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5170a8-0bf8-4cc7-b447-3563e9535c59/how_often_to_use_rid_x_septic.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_6a5a717229304e2dbb836a2c692c3554.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abce2838-b60b-4417-b6b3-ab9005df4e14/rafagoninevimukomunudefi.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/crossfire_philippines_manual_patch_forum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703e0d09-fac3-41f0-a67c-bf52b828edbf/68875836632.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/english_to_marathi_alphabet.pdfIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_2c35905154bf49adabf3ae43b3a54d99.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3602c9b4-b5b5-4c60-a96d-f583b7b2dc05/words_that_rhyme_with_moonrock.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/tetetezaxulefi.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_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 5244 bytes
SHA-256: efa32f301d18569de3e332703bfe17a8495463c615b0ff1f5e478429c4cdfb35
font_01_sfnt_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 10896 bytes
SHA-256: acd407a149348531e91a2ab78015f5bf1abcf7b893e03905fc6b9a16adbf25f5
font_02_sfnt_off000134b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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