Malicious PDF — malware analysis report

Static analysis result for SHA-256 29538989cd6b50f5…

MALICIOUS

PDF

84.4 KB Created: 2021-03-19 08:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c2e41d5df555406447ec6a17b01d2f6c SHA-1: 21a1a0286b7e9a947f76e02ee62da87f6880ab97 SHA-256: 29538989cd6b50f578b70da9c12718329a9a2d30286f33262688eae045a0bd7e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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 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://baarspo.ru/award?keyword=navy+blue+jackets+manual+25th+edition+pdf PDF link annotation
    • http://rixorevu.getenjoyment.net/how_many_days_to_learn_html_and_css.pdfIn PDF document text
    • http://wegasanapifare.iblogger.org/petty_cash_request_form_template_excel.pdfIn PDF document text
    • https://lolovegadagofi.weebly.com/uploads/1/3/1/6/131636941/sorif.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/management_of_adnexal_masses_acog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_600b2c6f59a8d.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/d6ec5fe9d024ab0.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/0dd0bea771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_603581cf26083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_6022fb606ef4d.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/lutumekex_lijon_siwenazezo.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/tepixofarube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_6c9a33d35c9544d19aed094a0aedc1f5.pdf?index=trueIn PDF document text
    • http://suborox.epizy.com/tigebukonidawemedu.pdfIn PDF document text
    • http://dosibaguluf.epizy.com/how_to_draw_in_procreate_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e135dce-cdca-4506-9b20-8250f0a927e2/how_to_get_a_better_sat_math_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06688228-dc33-4cfb-9010-926b0112b095/veluxerunam.pdfIn PDF document text
    • http://tosasip.epizy.com/accutire_ms-4021b_digital_tire_pressure_gauge_manual.pdfIn PDF document text
    • http://zuzipidagazetu.rf.gd/seismic_data_processing_matlab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6008184b-5bfb-41aa-b7bb-47d59455d1ab/how_to_draw_anime_hands_on_hips.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_79344c824d5e44ac820b7d493d2d6ca8.pdf?index=trueIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_8dbd19e99d06431dbbc3eb38e1ed055e.pdf?index=trueIn PDF document text
    • http://vajapojaperusu.myartsonline.com/3678849621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ecc551-7560-4e8c-b396-f5864d7f8656/24337677922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738eec38-a3c7-4451-9804-c567ed8775ac/schwinn_womens_riverwalk_26_bike_periwinkle.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_27fa3dbbaa574a6d84c68462c6bcdfc5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 5848 bytes
SHA-256: e767b21cb200519370a23ffe3021b066da3d8fcd3b79c917aeae03f4022a736a
font_01_sfnt_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 10776 bytes
SHA-256: ebcef4e32351cf63720c78b7c31d4e046d88fdc5d06e81ec7413f4567e31b0d1
font_02_sfnt_off0001341a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176