Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b00812c13b4585…

MALICIOUS

PDF

76.3 KB Created: 2021-03-11 11:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cbbaccde82ebc77df2577ec500f346ee SHA-1: 9709fccbc4676e0f87311d712e3b51766b40668e SHA-256: f5b00812c13b4585174f778d026abe4b23ba446a5dbb7aa4d0bc6bed38eca332
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://xezojetit.ru/wix?keyword=1982+to+2020+inflation PDF link annotation
    • https://guzarimu.weebly.com/uploads/1/3/4/6/134608133/3998241.pdfIn PDF document text
    • http://ujjjrrrrr.space/8837710453013lb4.pdfIn PDF document text
    • http://xapizokawe.iblogger.org/ballance_game_full_version.pdfIn PDF document text
    • http://sallehub.xyz/jizidezjr2oa.pdfIn PDF document text
    • http://rgtuitp.ru/theories_of_social_entrepreneurship_pptsw6di.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/padonuzude.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/sasijuridipaki-famujirusaxural.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/wowerukaw.pdfIn PDF document text
    • https://gegovowazuravas.weebly.com/uploads/1/3/1/3/131398401/gawonakosusotob.pdfIn PDF document text
    • http://medyahanem.com/xavexilubekepowpsaue.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/303020bf-875b-4604-a8b1-337b6e61192b/jbl_xtreme_2_speaker_-_black_jblxtreme2blkam.pdfIn PDF document text
    • http://gizivafufet.rf.gd/18949324947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8be9b83-1c99-4632-b759-707d601cf221/werugegixemedinuba.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_688b2832ea2342a8a0b47d7dc3c72194.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/06851f00-e962-4c09-9fa8-93b9a4a64d35/how_to_teach_social_emotional_skills_to_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f426b8c-801c-4459-88ef-b19e65f848fa/are_hot_water_heating_elements_universal.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_7428168d697041b3bb1e83ddf2305a5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaec1ffe-aebd-4fd1-ac2a-fb62b7d0c4a9/which_weight_loss_app_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174f573f-9f64-4fa2-b9ea-9e0beefba37a/tenant_walkthrough_checklist_ontario.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_1728912150c346d0b567c92e6efdf949.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_68c0d4c16d7641a29104d61fdd779711.pdf?index=trueIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_b010728b93a140aabd01d27d912a9661.pdf?index=trueIn PDF document text
    • http://jedalavupu.epizy.com/cannot_find_module_reactnativetransformer._js.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_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 5068 bytes
SHA-256: 1bb6465d41ac44057be93e32ea63a4dbd69a57873e33516cd7ebf4a879c1d7d1
font_01_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 10936 bytes
SHA-256: 828936a87026698fbdbcf96fa0ebd9b99b8411a0c020d642cfc7afaab11c989f