Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9b9d0206479e18…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 00:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cefcf3eb0e5be6f0460c80837b2f02bd SHA-1: 5a02d46c3aa2cb619c0fc810949f074c684a4ae2 SHA-256: dd9b9d0206479e181f90028006b67ab7d8586a8082b7dc34036ffd3b793b951a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm or phishing lure. The heuristic PDF_SEO_LINK_FARM indicates the presence of numerous external links, with one example being https://ponafet.ru/strik?utm_term=motorcycle+diaries+music+soundtrack. While no scripts were extracted, the sheer volume of embedded URLs suggests an attempt to redirect users to potentially harmful sites, aligning with phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=motorcycle+diaries+music+soundtrack PDF link annotation
    • https://zoxalutaj.weebly.com/uploads/1/3/1/4/131407742/puxis_jokotoramolo_boraso_miroperigob.pdfIn PDF document text
    • https://werakemil.weebly.com/uploads/1/3/5/9/135973214/9719844.pdfIn PDF document text
    • http://yandex-dostav.ru/zasivoxij68oig.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/nisowolop-genegulur.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/geku5gd/59656053565.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/jgihYX9/assistive_touch_for_android_mod_apk_download.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/13967572676.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/repibitekin.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/bzJgegi/zawia_rpg_discord.pdfIn PDF document text
    • http://dle-tpl.site/13493704231vgj22.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/rakabexozu/pediatric_ccrn_review_questions_online.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/sijefosibonorufififamifu.pdfIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_b9d6c25fe9ce4cc290e903baa6a72452.pdf?index=trueIn PDF document text
    • http://bafuwujix.atwebpages.com/78586354792.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_457995b33c2f406a971f52bc96d0f9a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/madukinoribawuguzixo.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/lotefidizugatovogob.pdfIn PDF document text
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_106f563b1b7b44639bc750a947c28b3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/nephrogenic_diabetes_insipidus_treatment.pdfIn PDF document text
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_803296c42e3645d0bf6c7cc74c068535.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF4 5256 bytes
SHA-256: 3ee1bde0a1cc1cb88a858c412509a058c4609d56537ae464fdfaaf00737c999e
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 12512 bytes
SHA-256: cfe86d717ffba622ca62b3ca47275cfb590c7c329ef58e46d818891af7a926f5
font_02_sfnt_off000125ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CA 16812 bytes
SHA-256: d15eb440cba4e0d7c1defdc3f67866725467f02846739f8658f0bf22f93d7759

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