Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5ecd0bc3399467…

MALICIOUS

PDF

72.4 KB Created: 2021-03-03 04:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 330117acaa9f82dd33b25538c23c78fe SHA-1: dca6fb2b111fad91cb485ac3df38f27056f99d3c SHA-256: dd5ecd0bc339946792f7b470167aa43c6a699328269f85c994cc6e13f50da5e6
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or SEO spam campaign. While the document body suggests a recipe, the embedded links and the PDF structure point towards a malicious use case, likely involving redirection to phishing or malware sites.

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://jumiwimov.ru/strik?utm_term=easy+stollen+recipe PDF link annotation
    • https://cdn.sqhk.co/bulunazi/ibjc8Hh/cotton_ball_painting_for_toddlers.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/lisuxu.pdfIn PDF document text
    • http://salestore.pro/informatica_powercenter_workflow_administration_guidezrh34.pdfIn PDF document text
    • http://lady-bug.club/camerafi_live_pro_apk_cracked1jyr5.pdfIn PDF document text
    • http://profibrend.ru/83812673155kp8co.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/8jeii0W/xebubu.pdfIn PDF document text
    • http://thesimplycompleteseries.com/jupikononnd001.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/Uqghhez/roller_splat_amaze_colour_maze_with_painters.pdfIn PDF document text
    • http://hr-insider.com/256614155344chkb.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/daniwodug/mixpad_audio_editor_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/eve_online_mining_guide_for_beginners.pdfIn PDF document text
    • http://xixujoteb.epizy.com/are_history_books_accurate.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/believer_remix_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/case_report_autograft_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/17046882546.pdfIn PDF document text
    • http://gisujok.epizy.com/python_3.6_free_download_for_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/88628432400.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_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 4984 bytes
SHA-256: 32c9bea1f75c33d9f80ceaced5dc80419c893c25f8f3541ddd2c123c32485529
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10844 bytes
SHA-256: 40456250a77b5cd30fc9677e948b0c828bbd3ea34cdbf56a051d6865b798fcc9

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