Malicious PDF — malware analysis report

Static analysis result for SHA-256 da30e26fcea241b1…

MALICIOUS

PDF

87.8 KB Created: 2021-03-11 17:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ca88b8a947d81e364d9bac9c6669a8d4 SHA-1: 8e3af540a4b094e36c8e3617f6be68f257577686 SHA-256: da30e26fcea241b14f4f3180685830eda8ca2c3caa5b9e39e89bdba33d6b8511
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of external URIs and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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://dugedepap.ru/strik?utm_term=latin+for+dummies+pdf PDF link annotation
    • http://honbiz.pro/gefegujavaur5sx.pdfIn PDF document text
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/vuvuzebigugesig.pdfIn PDF document text
    • http://sosed.market/breakup_of_yugoslavia3hosa.pdfIn PDF document text
    • http://jushq.club/dr_seuss_abc_beginner_book_video_youtubeyozq3.pdfIn PDF document text
    • http://zoosalon.org/19869366179mbvm2.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/8044260.pdfIn PDF document text
    • http://getcreditcheck.info/navy_blue_coat_mens_outfitbhyyt.pdfIn PDF document text
    • https://zidipezes.weebly.com/uploads/1/3/5/3/135314083/2370738.pdfIn PDF document text
    • http://gizaripe.iblogger.org/how_to_color_skin_in_illustrator.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/xavefawinix.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://uploads.strikinglycdn.com/files/aa27227a-2b22-468d-a794-50c435aab53a/garmin_astro_320_web_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff39b82-2fd5-4a2f-bb25-82bda15dc5ac/sig_sauer_1911_tacops_specs.pdfIn PDF document text
    • http://lejaxofin.epizy.com/speech_writing_format.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_03053806a16b4a23844d1297c0e2d46e.pdf?index=trueIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_52af8c55d9b74b9fa2df1dc0f07a236c.pdf?index=trueIn PDF document text
    • http://jadaxoletigagin.epizy.com/ministry_of_manpower_employment_pass_services.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_0b681ca775c24e65af82c3c0944599a6.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_f235b65f742e47d285de4d0ec62fde67.pdf?index=trueIn PDF document text
    • http://woriloxalodar.rf.gd/seraritamukavetowalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c3957e-aa43-4318-b28f-25b471d295bd/1001_netflix_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6610de-f78e-42af-9356-4599fc504027/the_real_christmas_book_free.pdfIn PDF document text
    • https://c0c9c656-f2f3-417f-ade5-c2be895370dc.filesusr.com/ugd/bf07b1_81b35400e171458c88492faa377ba2fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f667ca8-c6f6-4614-932c-22cdce4c75d7/que_es_la_contabilidad_segun_diferentes_autores.pdfIn PDF document text
    • http://woxuviju.rf.gd/roniruxegaxegamimegiti.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/bagevipemumi.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/anti-_formalist_rayok_translation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E02 4980 bytes
SHA-256: 122cb4899f52482871caa32ee2fbfebca4712ca80ab531a482a910d2f113ef38
font_01_sfnt_off00011ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED4 10692 bytes
SHA-256: 4c78d9f8611244d398962e3a8d3e23af66f9afedc98d1b0b3ab7529711a2df74
font_02_sfnt_off0001437b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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