Malicious PDF — malware analysis report

Static analysis result for SHA-256 be345d6c9a0b80b6…

MALICIOUS

PDF

70.5 KB Created: 2021-02-17 05:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 041bd74040df5ddbb87bdfa5dde5744b SHA-1: 366c9865bac06db989543afc29a04b15644babf8 SHA-256: be345d6c9a0b80b6cb057886f52f06421bc6720ff8c1e7d0e7be8d6acdbccb0c
156 Risk Score

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://maypoin.ru/aws?utm_term=2006+honda+odyssey+oil+pan+torque+specs PDF link annotation
    • https://tufelonidozuwux.weebly.com/uploads/1/3/2/6/132681512/7819411.pdfIn PDF document text
    • http://show-visitor.xyz/lakamitosidafijonafotegl3k.pdfIn PDF document text
    • https://bejutenexej.weebly.com/uploads/1/3/3/9/133997629/5495517.pdfIn PDF document text
    • http://netlysy.online/vufiduketuzafokaxuvomebgurz5.pdfIn PDF document text
    • http://myluckywin.site/kawuweseregidobimcxlov.pdfIn PDF document text
    • http://ketosimple.online/2928127233df57r.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/tobobowu/tujafe.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/angadi_theru_audio_songs_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/goloxuwaruminutuban.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/71076427293.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/happy_birthday_punjabi_song_jordan.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/dopululujekab.pdfIn PDF document text
    • http://zogonigabi.rf.gd/lorokivigopomesilik.pdfIn PDF document text
    • http://turegipamikum.epizy.com/aha_stroke_tpa_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/litofir.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/alif_se_full_video_song.pdfIn PDF document text
    • http://togugufi.epizy.com/94647708557.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_off0000d49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49D 5724 bytes
SHA-256: c9787c48077ae1bc9b49c19380132148770f66c2585586bc8c2502a700740b8c
font_01_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 10872 bytes
SHA-256: 9001943328409ffa3d9248f513f28bfe1a7a53a0a9054a4f9be982fef3185247

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