Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ded851804c6d2a…

MALICIOUS

PDF

87.3 KB Created: 2021-03-16 11:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16f4988ea2db6ed7c20cc88237874375 SHA-1: 8433cdde3bdba184d6146ae3c5312dbf466ae941 SHA-256: e4ded851804c6d2ab59cc3ab1ce015aa2100dc626fe8b8dc27bb912ee5edb769
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-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://vilenefex.ru/wix?keyword=last+trumpet+ministries+international PDF link annotation
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/7bc52f3b4649ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5ff6856b1742f.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/GUjfRhi/andor_s_trail_quest_just_the_beginning.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/what_is_the_main_point_of_the_sisyphus_myth.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/geiZ0jh/guide_money_maker_3d_print_cash_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529095/normal_604a80979994a.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/savogejumawefegow.pdfIn PDF document text
    • https://babaperivagam.weebly.com/uploads/1/3/1/3/131379833/sijogufe.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/xoxuwesozomi-bufobupelifuki-pugobajajumiv-kezamadatoxipu.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/2239141.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/zarelusipofox/riwenefoseg.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_5e2ff0257f934245991a8e159343eb10.pdf?index=trueIn PDF document text
    • http://vekabun.myartsonline.com/87402428109.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/keremu.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/chinese_zodiac_dual_audio_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/lamijofegokemozuwudinowil.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_6b0a4336a6ee42bcb86a7606ac6c1043.pdf?index=trueIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_fc574cfd55f94056a2f55bd017945655.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosagoba/88888704168.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/snark_tuner_amazon_uk.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_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 4908 bytes
SHA-256: b74736e87cc885bcb6d1c7cfcb3fdea4e58f33146005836aec857fff4b69c358
font_01_sfnt_off000128f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F4 10872 bytes
SHA-256: 1f2782e88ecdeafcbc6fc0c096399c12d5ecac88c2429189286534fe1c54f622

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