Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaaefd9312e8714…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 22:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 14ef938aed1f3c71ca798094635a86fd SHA-1: 0807a45876f2120314c34508d306c52c0833c39f SHA-256: abaaefd9312e8714c4ae061616671d259b06d1607dee2ea455af6376517b4e9f
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to 'Seth thomas westminster chime clock value' and is associated with numerous external URIs, many hosted on disposable domains and employing UTM parameters, suggesting a phishing or redirection scheme. The presence of external URIs and the nature of the heuristics point towards an attempt to direct the user to malicious content, likely for credential harvesting or further malware delivery.

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://leonvi.ru/strik?utm_term=seth+thomas+westminster+chime+clock+value PDF link annotation
    • http://gufurebu.medianewsonline.com/gugax.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/pizokujekefamiw-voxagosamemina.pdfIn PDF document text
    • https://doxuvufunufake.weebly.com/uploads/1/3/0/8/130874670/gapanetobagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_603e6aac9c1bc.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/6110759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_602fe614aeb9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420612/normal_6008cad1cb4de.pdfIn PDF document text
    • http://sidagopuxi.22web.org/96415908202.pdfIn PDF document text
    • http://esclub.pro/85994085453fyo7c.pdfIn PDF document text
    • http://tiktokhd.design/the_new_male_sexualityyo06r.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/american_economic_history_timeline.pdfIn PDF document text
    • http://prodson.fun/713791064970dqnn.pdfIn PDF document text
    • https://darenufu.weebly.com/uploads/1/3/1/4/131438483/dadffa30d87.pdfIn PDF document text
    • http://labetimo.iblogger.org/pumuxadadi.pdfIn PDF document text
    • http://nerroba.info/wipowavawadivuwukamaky3lk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navorusisuwo.rf.gd/playboi_carti_songs_download.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/cranfield_commentary_on_romans.pdfIn PDF document text
    • http://palulofegag.rf.gd/atherosclerosis_formation_steps.pdfIn PDF document text
    • http://litikebunofo.rf.gd/90585740215.pdfIn PDF document text
    • http://faxumev.epizy.com/3rd_party_transformers_buy.pdfIn PDF document text
    • http://pijoxijok.rf.gd/eldorado_trail_guide_hlt_tires.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/libro_el_secreto_de_selena_gratis.pdfIn PDF document text
    • http://texokobatogu.epizy.com/osmosis_dialysis_tubing_lab_answers.pdfIn PDF document text
    • http://depuniwawugupi.epizy.com/cardinal_numbers_1_1000.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_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 5360 bytes
SHA-256: 4270f5adc9d8ee5da5817b8e84a58ba1d49b1797edf0692135c251b72d3120b7
font_01_sfnt_off00010c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 10768 bytes
SHA-256: 866530bbd11fa3ec18a3db50df76d148cb9999f1a2f52bae38d763ade498b620

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