Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1394e5a15ba9bb…

MALICIOUS

PDF

76.1 KB Created: 2020-11-11 06:26:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: da2d0f46edc69f176cb9e35ed60456a5 SHA-1: 2bfb86f9509eafc137df029bb32eb1ea1896a920 SHA-256: 1a1394e5a15ba9bb2a1b1e4780601bcb508bf389223b4c4ec79b7e1b02736eec
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-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://traffset.ru/123?keyword=particle+motion+ap+calculus+ab+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f92c79f92ca4.pdfIn PDF document text
    • https://dedofuzogod.weebly.com/uploads/1/3/4/3/134374436/11bbd1ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f8d253b7bebc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/how_to_win_one_direction_tickets.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/44559647014.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/80142969337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8fc954-b7df-47cb-ac78-4d54bb5d8c0c/fourier_integral_theorem.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/zadisusowojaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ddf6633-0312-4180-8f04-b086e16edbd7/67683750331.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/robber_baron_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a149bbb3-60b8-421c-8aa4-83f48cb1110d/qubit_dsdna_hs_assay_kit_range.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/76576022527.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/katy_perry_songs_vegas_song.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/complete_bodyweight_workout_program.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/rewugewesuzutelatufipero.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/17518891401.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFF 3300 bytes
SHA-256: ae0074af110185dc058555acaa58fd16b256cfa9c2e8bfe907d6787c2f9f10b1
font_01_sfnt_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 5468 bytes
SHA-256: fa8d1d780b15de3614e9bd8e88dc6a66da5fc5bda84d7c7b5d1cbe9503b86e26
font_02_sfnt_off0000dd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD17 2128 bytes
SHA-256: 0af152e71deae4043defc38d379a406e4f4a6824aa4ecb907caf3332e58cacfa
font_03_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 9904 bytes
SHA-256: b97c89e1d66f3f1424fad60e0c96f80ec7732e4b6a01cceb049f2c04b1defedb
font_04_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 17148 bytes
SHA-256: c13e25c4fb0064b3044ddeb8bf809f7b340917e493effdc06d6448e100ebd8d8

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