Malicious PDF — malware analysis report

Static analysis result for SHA-256 89de2632a1b0fe92…

MALICIOUS

PDF

88.4 KB Created: 2021-03-10 16:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c999f29369b7b741056efe9139c245e SHA-1: 8700576a25b2b14262865d11ea213ec491190e28 SHA-256: 89de2632a1b0fe92f44ab938a9ec700d103c700657ad1680ef77e663101f7585
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified as jumiwimov.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, contains text related to downloading a PDF, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=descargar+libro+cual+camino+pdf PDF link annotation
    • http://bonifacy.site/huck_finn_multiple_choice_testaz8wd.pdfIn PDF document text
    • http://bigpleasure.ru/how_many_percy_jackson_heroes_of_olympus_books_are_thereaiir4.pdfIn PDF document text
    • http://fb-ig-copyright.com/rheem_tankless_water_heater_troubleshooting_no_hot_waterip8o9.pdfIn PDF document text
    • http://idealicaitalia-official.site/26552589600jvepd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_604110f2658d4.pdfIn PDF document text
    • http://monoga.space/best_email_templates_for_marketingc7a20.pdfIn PDF document text
    • https://liritetujom.weebly.com/uploads/1/3/5/3/135310948/seloki.pdfIn PDF document text
    • https://xaperosojemi.weebly.com/uploads/1/3/0/9/130969510/wodakevin_sobijewuzab_sopax_ligek.pdfIn PDF document text
    • http://shoplus.info/124967061907k9l6.pdfIn PDF document text
    • http://mx50off.pro/nostalgia_electrics_popcorn_maker_assembly_instructionsre2ox.pdfIn PDF document text
    • http://digtalcaliper09.xyz/supavutitutonodiliczqlo.pdfIn PDF document text
    • https://fagezatev.weebly.com/uploads/1/3/4/7/134711774/tozomapob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5fc599acd9b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499282/normal_601071834e099.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/7377847.pdfIn PDF document text
    • http://delaem-sami.online/25036359015l3bfo.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/xomepixo/d_s_l_r_ki_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431b4e94-5f63-4d85-b93f-8779bf8a2dab/16118778493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0783a741-874c-46e9-9495-6d1baa0249ab/20605999665.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/aerodrom_split_informacije_telefon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae73c68-9e72-473c-b08d-eb295646773d/whirlpool_du850swps4_not_draining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e976b6c8-6e5d-4b98-b758-c3333e27426a/plato_the_trial_and_death_of_socrates_hackett.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/29061320679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363892ed-e3e0-4b20-9f77-2b11c2f660dc/96688335443.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/pomovuxarut.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_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 5612 bytes
SHA-256: 109a7f87996ce312069cd7ac229f12e980742d7945057ae6199574085ec09c5b
font_01_sfnt_off0001291c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291C 12944 bytes
SHA-256: cc87519beb6410c9b01dfd94cffc9cf18f7c5e03eab4e3cb864855ea26286b60

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