Malicious PDF — malware analysis report

Static analysis result for SHA-256 689ba6ef15b27b65…

MALICIOUS

PDF

71.5 KB Created: 2021-05-22 00:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 014f5e755eb216bbc9c2331d9f624aec SHA-1: f241bccf572b2a99c1543d50127bf4c20b741902 SHA-256: 689ba6ef15b27b65e8e4d23a6615d8383f6ac9ed9ed058590504e2e47283647a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, forming a link farm for SEO manipulation. One prominent URL, https://jottigo.ru/wb?keyword=canon%20pixma%20mp160%20scan%20software, suggests a lure to a potentially malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=canon%20pixma%20mp160%20scan%20software PDF link annotation
    • https://govewusig.weebly.com/uploads/1/3/0/9/130969429/tivorakisitamowovig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_601673b0d199a.pdfIn PDF document text
    • https://faporipito.weebly.com/uploads/1/3/4/6/134600592/zutuxemezuno-velerewegoma.pdfIn PDF document text
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/3222962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_604e340f17afb.pdfIn PDF document text
    • https://sozakipebi.weebly.com/uploads/1/3/0/8/130814717/jesejaf.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/kukazowox/introducing_applied_linguistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c1c020-3b7d-46be-b339-485425e3f57e/ambir_scanner_calibration_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/focusrite_scarlett_2i2_2nd_gen_drivers_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/vampire_the_masquerade_v5_character_creation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/92849845300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d6971e-bf55-40bd-858a-d1fcb64e268e/gifivaweloxopifobus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ebd296-72d2-4258-b6e1-66f981939f9e/quinny_buzz_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/niludugevoketa.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/how_to_share_sheets_in_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ab5470-da5b-4b58-8eca-e716c317fc0a/english_vocabulary_words_with_meaning_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/micro_brain_2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a81753-8db1-43bc-9b79-d3c83d6845d0/cuanto_equivale_una_pulgada_en_cm.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/2019_hollywood_movies_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a56e636c-92ba-4c18-a313-34350eb68736/vesam.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_off0000d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 5540 bytes
SHA-256: 074dfdc3337ab7309c7e0f96e1f0eadb9701b7f91885cdb97ee8ad5377b6d3c4
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 10692 bytes
SHA-256: 568a9c5a867edc71c4ede5e4a54f724346c47e87566dfaccfb22839d7e622e8f

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