Malicious PDF — malware analysis report

Static analysis result for SHA-256 0292d288d6403264…

MALICIOUS

PDF

86.1 KB Created: 2021-05-09 17:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f997717dd097e397e84f1ca35a8520be SHA-1: 514f4e11eb50a63733ece0a6f06a528544e66e98 SHA-256: 0292d288d640326460e9af6161758bcd2b1814841c451bf7cecf274904fae305
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-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://fokemale.ru/strik?utm_term=kero+sun+radiant+101+wick PDF link annotation
    • https://topipanonotege.weebly.com/uploads/1/3/4/6/134679812/6793247.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/5940827.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/2197168.pdfIn PDF document text
    • http://vakimudefevu.22web.org/tevukazagaturuwiwon.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/mexijegedakol/lcso_booking_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/guitar_riffs_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/87129078515.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/92694898985.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/67387220751.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/cardinal_newman_school_luton_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/how_many_spell_slots_do_warlocks_get.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/botanical_name_of_trees.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/zigusebigitulujibinej.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/72362050407.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/feguxivorirep.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/wipanekiwegimuwute.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/android_chrome_cookies_location.pdfIn PDF document text
    • http://tivibejegidabiw.epizy.com/amenerrasul_arapa.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/51185959934.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD69 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 5220 bytes
SHA-256: 6b85af22292051bf2f0716894afe80f97eaf8ccf538cd7de1fde20333f4f4d35
font_02_sfnt_off00012039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 12276 bytes
SHA-256: 8c8826078ecc005123dfe3c5b9d0f2794c14416444c86bba2e9e023f40a953ce

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