Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaf544e31957e7b…

MALICIOUS

PDF

77.6 KB Created: 2021-06-08 05:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 86760cb1e0cd9f84c6378ffed617c673 SHA-1: 3c6112ee68aafc39560a3443c07f310c87cd35f2 SHA-256: bbaf544e31957e7bf4a151d2e1ce38b218625d7bc58a5858898ed6611e33c925
186 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, flagged as a link farm. One of the primary URLs, 'https://pixomot.ru/pbw?utm_term=hot+row+workout', is associated with unknown reputation, suggesting a potential phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/pbw?utm_term=hot+row+workout PDF link annotation
    • https://kemolarutu.weebly.com/uploads/1/3/4/6/134685450/pebujajezet_wetemomi.pdfIn PDF document text
    • https://lajakobu.weebly.com/uploads/1/3/4/5/134599687/rasodoseges.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/sulov-kebasap-kezatew.pdfIn PDF document text
    • https://jilefufut.weebly.com/uploads/1/3/4/1/134109271/8762986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c686ab-99c1-40be-bf06-24b89cae0cb3/bekulotataze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60719d9-d203-44c5-94f2-58e75734856b/bigadapibawajanojaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe74093-5818-4777-94b6-74d46305cde9/mufovefowukusopejipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e63b74f-597f-4c08-8cde-fe6dbac4bb2f/38609834905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3c4022-1c68-472e-af2f-fb5f676c7a86/best_get_well_wishes_messages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c556e09-aefe-4443-8658-0c1b8288c5e5/cortisone_shot_side_effects_in_hip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee878a1-a3a1-4d23-b7ec-c63d7e509ad3/acceleration_due_to_gravity_vary_with_height.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/how_do_you_manually_unlock_a_maytag_front_load_washer.pdfIn PDF document text
    • http://jezopisi.pbworks.com/w/file/fetch/144666579/possessive_adjectives_esl_lesson_plan.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144678588/78784496182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b080139-f1e2-49d4-9913-996de25b11fa/ibis_paint_x_download_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2eb4f07-4f01-4336-a997-7865f3aee4f2/how_to_clean_my_cleverspa_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427fd9d8-66e8-47ba-9a37-377d82ea19d2/adobe_creative_cloud_download_frozen.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/gadevumiberedosakuju.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144427101/16763376020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce73f16-ca37-4554-9dfe-13eafcd24268/82447282332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c195ea8c-59c4-4205-9481-12645a05a171/que_es_un_autorun_exencin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdaa042-855b-47f3-8411-bc334bffcfef/govozijajegubafiwogikeva.pdfIn PDF document text
    • http://pusavivo.pbworks.com/w/file/fetch/144656046/el_murmullo_de_las_abejas_libro_completo.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_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 4376 bytes
SHA-256: ee4e72e9b21e12688d622149e73ce9c65cdf74205212cf6cfb79e8d5e734a5ed
font_01_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 11624 bytes
SHA-256: 9fe0af244d593976322828c48b6ad998e4f9c6bd199e354489b09be6c6c4b09f