Malicious PDF — malware analysis report

Static analysis result for SHA-256 6940db9f92249106…

MALICIOUS

PDF

73.3 KB Created: 2021-03-08 17:29:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 39560d564728621d0cd18856f47770a3 SHA-1: b5a0b07aa42c924aa6078ad770226321b9610cc0 SHA-256: 6940db9f9224910695b0ef62fc5b77a106048985d28ce86a0d0a56ff9cd406e8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://resalured.ru/123?utm_term=lead+sheet+music+for+keyboard PDF link annotation
    • http://xoxosedefoxadu.mygamesonline.org/qu_significa_la_palabra_destruir_en_la_biblia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_60034f86ea213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_601a05b16c9e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_603e132a809ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5fed802e45f97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480904/normal_6027c66e5751f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5fdffcf7a9584.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/46535227435.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/webifev_xuwam_dotakalakemowe.pdfIn PDF document text
    • https://muputobiga.weebly.com/uploads/1/3/5/3/135308906/7956958.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/begijufadi/kogogisowimukakuzume.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/diono_radian_3_rxt_forward_facing_recline.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/91423246761.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/nios_pdpet_assignment_front_page.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/free_online_historical_romance_novels_to_read_now.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/pirirekovika.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/how_much_should_a_screenwriter_get_paid.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/xixodorakokewabu.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5476 bytes
SHA-256: 27d700f16878d50e2e28682199b456bb469031ad0c6d37bb6c0b9a3208bb4092
font_01_sfnt_off0000f4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D0 10448 bytes
SHA-256: f3444766dccd61a38951e519942afac83420417587f17e0bbd64936abebd3b26

Open this report in the interactive analyzer, or submit your own file for analysis.