Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca96a5b268036b1f…

MALICIOUS

PDF

76.2 KB Created: 2021-05-16 19:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 306d4d194d3c1210ee0245403b10f0c4 SHA-1: 1d0f27c582b0e86c63aee5e851f08b77c6eb5aa9 SHA-256: ca96a5b268036b1fc3c4463fa2c32f74ddd0bd2486f74b94b81cc95edb79fbc6
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 0.9996

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/strik?utm_term=printable+ged+math+practice+worksheets PDF link annotation
    • https://cdn.sqhk.co/zuvomafoda/ij0ibid/205079252.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/fQjcLtf/31857664250.pdfIn PDF document text
    • https://samituvejasuw.weebly.com/uploads/1/3/1/4/131406365/morimimodo-sozisev.pdfIn PDF document text
    • https://balexasureg.weebly.com/uploads/1/3/0/8/130874281/dotizituxamizolu.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/eaacf07c.pdfIn PDF document text
    • https://xupulepil.weebly.com/uploads/1/3/4/3/134322414/3307335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_6042df202de96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_60013a71f2ba9.pdfIn PDF document text
    • https://sazizilas.weebly.com/uploads/1/3/0/8/130874530/notamubebili.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/u4jdtcf/john_deere_410_backhoe_parts_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_6023b09aaacd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fd7b717341c9.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/annapurna_trekking_map.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/likadojivivofu/bootstrap_template_user_profile_page.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/tatufukokakojozasujojuni.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/dajeberuworelazunuloreze.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/how_to_program_a_genie_garage_door_opener_model_7055.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/nikon_prostaff_rimfire_ii_3-9x40_bdc_150_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/2011_chrysler_town_and_country_touring_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/is_a_mustang_gt_reliable.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/apple_music_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/ingles_side_by_side_book_1_chapter_1.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_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 5784 bytes
SHA-256: ebd6ddcddb612e24db557246b0395bd306ae62fea388b1ef9cc998009d672974
font_01_sfnt_off0000fe78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE78 10840 bytes
SHA-256: 19b07dd195461827b0146743fe7abd11477cb71c1e0d929838383e7ad056721b

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