Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e22a5787f84d98…

MALICIOUS

PDF

83.1 KB Created: 2021-03-15 13:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5862700058dfa868ba57bf5cc8c215cf SHA-1: 5bc739092e088e7559fd9976bd30f91b651670cd SHA-256: 32e22a5787f84d98ba10c40811b3e125187a09c1a4c3b8c58a102ce269830495
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. One of the primary URLs, 'https://botokaw.ru/123?utm_term=latest+bootstrap+css+free', indicates a potential lure related to web development resources. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=latest+bootstrap+css+free PDF link annotation
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/daca9877d9119.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/tulawox.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/mibogefegufax.pdfIn PDF document text
    • https://besunuvoduzusub.weebly.com/uploads/1/3/4/2/134266379/8533982.pdfIn PDF document text
    • http://kuwawaf.mypressonline.com/97259177562.pdfIn PDF document text
    • https://ruvesupiranaduk.weebly.com/uploads/1/3/5/3/135314660/julowoxezanek-jobodobobib.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/vegetarian_weight_gain_diet_plan.pdfIn PDF document text
    • http://gebigulexejo.sportsontheweb.net/55424681811.pdfIn PDF document text
    • http://rugavup.iblogger.org/budazokoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_7f5ee9ec3ff94e219815bba706ff2529.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_9cd6ea0ab88f485fb1fa670ef548f473.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_39d40678920c437ea988fdc5b98ce992.pdf?index=trueIn PDF document text
    • http://rojegasofibi.epizy.com/ralaxeda.pdfIn PDF document text
    • http://bekabugi.epizy.com/chakravyuha_movie_audio_songs.pdfIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_8c795628c45e44aea83589cad6023aba.pdf?index=trueIn PDF document text
    • http://wotonopeg.epizy.com/runenedolupexejikimip.pdfIn PDF document text
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_a474fbe7fb9e4d30b2fc8734e3b1436d.pdf?index=trueIn PDF document text
    • http://masusoxowep.onlinewebshop.net/principles_of_management_project_class_12_on_mcdonalds.pdfIn PDF document text
    • http://vujesidewu.rf.gd/how_to_check_intelligence_quotient.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/72114900859.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_444422ca79be4f62bd879f087199d850.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_46e0460808014fea857a705912e47a07.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 5056 bytes
SHA-256: 9e297a6cc7daa5d00e2c2627afd5b18984978d34f2cc0fdc010046f12f8d21f7
font_01_sfnt_off000119f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F0 11108 bytes
SHA-256: e3947e770c6e5f5d00e4726dff5c806b9d287288e6b9fa9e7c413c32de0555a2