Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8fdfde5b5fb74a…

MALICIOUS

PDF

77.7 KB Created: 2021-05-23 20:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c7d412d04f2143774f43a29250022e6b SHA-1: df6736eafb6d7bf8e0e1710b081cbf326376fc39 SHA-256: da8fdfde5b5fb74a281e3506d15b373c95c76c46807ad05e7726bcfc53367616
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-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://soxebez.ru/strik?utm_term=what+is+the+best+dye+in+terraria PDF link annotation
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/fb566839f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425214/normal_5fca0740eab9d.pdfIn PDF document text
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/8498633.pdfIn PDF document text
    • https://ronewomiz.weebly.com/uploads/1/3/0/8/130874064/b1a0f9f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_6056718b13513.pdfIn PDF document text
    • https://vatikaleme.weebly.com/uploads/1/3/5/3/135386674/vonozizolig.pdfIn PDF document text
    • https://lokamafurixese.weebly.com/uploads/1/3/4/5/134509290/9304995.pdfIn PDF document text
    • https://fugazuxelodurip.weebly.com/uploads/1/3/4/6/134639195/totizetiwo_wovepaxo_fonil_pijupawa.pdfIn PDF document text
    • https://beretukajawedu.weebly.com/uploads/1/3/4/7/134713042/120031567.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/mogedozara/apc_back_ups_xs_1500_replacement_battery_rbc33.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d15ff2-f110-47d8-a01d-254b1471349a/shashi_tharoor_inglorious_empire_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8239ce-07f2-45ab-bdc6-376b89be9f92/47763586249.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/rugavuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/how_rich_are_the_top_1_percent_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/eyiz_listesi_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/malayalam_movies_box_office_report_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72fffdf-fd93-44cf-8bb9-f35076e0c97b/fleetwood_prowler_travel_trailer_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcef0eae-658d-45c9-91cf-e2bc2eae776a/viva_water_cooler_8liech-sc-ssd.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/12520681764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39885122-dd6e-44cd-806d-865d670159b8/lupapojowugok.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/phrasal_verbs_exercises_multiple_choice.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_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5136 bytes
SHA-256: c572342759f3faca916d9141da0ccb6ccf05fbe888a36e989eac86621f630b67
font_01_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 10876 bytes
SHA-256: f33b9c58fad4bf2d0972506e0b40c21e87c7377552146828770628a4b19b696d

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