Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e86efd393711ca…

MALICIOUS

PDF

76.8 KB Created: 2021-01-26 02:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3e3a5ca882e183410fde7d473fb841d9 SHA-1: 3d7bd66dbf2735c9cb4053cb5ad8343e91756566 SHA-256: d1e86efd393711caa018b02a31a4761964fe3de054f442cd82a522da16a4ad5b
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to known malicious redirector infrastructure. This suggests the primary purpose is to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=serial+filing+system In PDF document text
    • http://zosujobitusup.iblogger.org/95550024192.pdfIn PDF document text
    • http://dizaxabon.iblogger.org/94021280192.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/9ebPrdr/facebook_story_saver_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/jfqp3Ky/22791542162.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/7225541.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/3774653.pdfIn PDF document text
    • http://zijimesaxa.iblogger.org/16431814234.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/tcg_card_template_maker.pdfIn PDF document text
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/e88aae.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/igzjd4f/cut_you_off_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/02ia8if/battlelands_royale_hack_iphone.pdfIn PDF document text
    • http://faguduni.22web.org/21108008864.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/bisazabe/icloud_photo_stream_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/graham_s_law_worksheet.pdfIn PDF document text
    • http://fiwarirekagugen.epizy.com/transformers_deviantart_comic.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/chitike_meeda_chitike_vesara_naa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/53204659187.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/ravolovatejedavonasugagij.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/foxeder.pdfIn PDF document text
    • http://wisunomimat.epizy.com/jerusalem_artichoke_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/reporting_factorial_anova_results_apa_style.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/bsc_agriculture_subjects.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_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 5292 bytes
SHA-256: 48b334454f5323e1b94433143f27ba57c2e9f5b2e20e66004d00551a83641703
font_01_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 10248 bytes
SHA-256: 648b8e158ed862d3e7d4a3090c6798a43ec24f9fc7bf8b98f9220d8052f997c1

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