Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7b48bb1fb9b8dd…

MALICIOUS

PDF

75.6 KB Created: 2021-05-13 19:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3c23e749546def67db934d93b9e97610 SHA-1: 203e2f860d149ec9955bff0344d427cbc33519cb SHA-256: 2c7b48bb1fb9b8ddd82f4f92c7a92a3b8918f8a83e9f5a1b3f29e3ad233ac09c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=what+is+an+infrared+quartz+heater PDF link annotation
    • http://vulufinagi.mypressonline.com/timeline_of_king_saul_and_david.pdfIn PDF document text
    • http://keep-travel.com/video_call_android_phone58i4k.pdfIn PDF document text
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/sobabewim-dawozo-nozoxiri.pdfIn PDF document text
    • https://julitigifoxa.weebly.com/uploads/1/3/4/3/134310533/8211137.pdfIn PDF document text
    • http://urott-hu.com/11066288314whz27.pdfIn PDF document text
    • http://busijizi.medianewsonline.com/pathogenicity_test_of_fungi.pdfIn PDF document text
    • http://bigowet.xyz/josomejwbs1n.pdfIn PDF document text
    • http://kibesamifi.getenjoyment.net/dexigodupuzifazefoxad.pdfIn PDF document text
    • http://service-hire.com/vaxofi34ess.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/diseo_bases_de_datos_relacionales.pdfIn PDF document text
    • http://rastet-malysh.ru/vuzejedatije0uecb.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/jonora/akshaya_lottery_result_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9740937-a804-4e44-a3a3-253364b7cc5d/wolavabe.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/lamedigovanadapozosi.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/vusixot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c821361-8813-45b5-8f26-2e77e4b68544/who_is_the_woman_in_wolf_of_wall_street.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/what_percentage_of_california_are_homeless.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/gixisir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89e4a84-9a4a-433f-a806-74e10e4f09b1/what_is_the_most_powerful_godzilla_monster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606846e0-ec34-487b-8991-5d6313dc8804/bowflex_pr1000_accessories.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/99260686250.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/zigowon.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/14332234660.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_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 5152 bytes
SHA-256: cfbed0b0f8688c860d5566a7ace0f89b4512e3ebc422b5dbdc9c5507066603da
font_01_sfnt_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 11136 bytes
SHA-256: 16b0108cf9585b56874edd0283cbdb86d5545de02cede13c0bf0c42c11e2e700

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