Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebeef85e0b52946…

MALICIOUS

PDF

80.1 KB Created: 2020-11-11 15:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 053436ccff140d47bf035a1781e994dd SHA-1: dc94604fe4b13c436b5fed16bd18dc808ff4988f SHA-256: 5ebeef85e0b52946b4a81078610845e6fb2afd6dace247a2f53d7e7509b1eae5
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 0.9998

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://trafffe.ru/123?utm_term=properties+of+cell PDF link annotation
    • https://vizomitula.weebly.com/uploads/1/3/4/2/134266598/1242435.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/6782f6.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/gebunuxevaraga-vukibi-kemavalefifide.pdfIn PDF document text
    • https://wotafoxig.weebly.com/uploads/1/3/4/3/134306194/migamorowaberawokov.pdfIn PDF document text
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/momefufa_xonevefiviwe_judujiji.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/fajeloninesitel/12611450560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4412312-f452-47df-994c-d247555adcd4/best_rain_shower_head_for_low_water_pressure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fe3ab6-af6e-45fe-a96a-be6f6878a26d/vufeligijirilulurijajovab.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/countries_worksheet_spanish_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/58046297768.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/cours_sur_l_apiculture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e7981d-f571-41f8-ba26-37b4c4d3094b/isabela_zip_code.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/su_carburettors_tuning_tips_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89342eb5-352e-4224-bb73-ebd6948b7c2a/19782848141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9657418d-2622-436e-b796-6666ad2cf942/vocab_workshop_level_a_unit_12_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7a05ac-9188-491c-9e18-d921793f8175/92648491130.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_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 4800 bytes
SHA-256: 2765adfc5977dc2f0cb7b5d25ca6855033080dfe493b02eca28c4d4e92284d6b
font_01_sfnt_off00010f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F19 10776 bytes
SHA-256: 4efe3b4e3653a34b636c352bf41869e397482c61cbdba1d491981c6772e3c44e

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