Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d94f394a4a3159…

MALICIOUS

PDF

81.8 KB Created: 2021-03-28 17:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dcb68db51aa33fa83e4544929a3723a2 SHA-1: 47318e58ec6b970c57d953d8cfffd5d37236ecad SHA-256: 75d94f394a4a315960fa9a5bfec888a80501a59f98711bc405523d6818afe6c9
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic analysis revealed numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an attempt to deliver a phishing or malware payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/wix?keyword=koti+womens+college+hyderabad PDF link annotation
    • https://cdn.sqhk.co/kozutani/ekiagd9/40016619324.pdfIn PDF document text
    • https://rizogedimawe.weebly.com/uploads/1/3/0/7/130739598/4bd013212.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/miwiwolege.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/A1OgddS/vodezojo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/j6R8iiU/samsung_level_bluetooth_headphones_price_in_qatar.pdfIn PDF document text
    • http://zuluwana.iblogger.org/petsafe_yardmax_invisible_fence.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/eighhib/nintendo_switch_can_t_find_ip_address.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/siwekosem-julajajijewe-ragijuxodamumaj-fuxazakagudebij.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/rubukusog.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/najetodafowovori.pdfIn PDF document text
    • http://rometolipopi.iblogger.org/osha_safety_training_program.pdfIn PDF document text
    • https://zulijijala.weebly.com/uploads/1/3/0/7/130740393/1191846.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/fI1gejd/yougov_pulse_download_windows.pdfIn PDF document text
    • http://sebokuxaxugu.iblogger.org/20900666001.pdfIn PDF document text
    • https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/9701005.pdfIn PDF document text
    • http://tafagejiveduda.22web.org/zenisazogegujiresufede.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/ada22354-aac0-4110-b267-ab58971610ca/67308506172.pdfIn PDF document text
    • http://widojedup.epizy.com/university_risk_management_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/ob_history_and_physical_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68614520-f5ca-4e88-b88c-f3060c3c10fb/the_dating_game_killer_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb220ee-dcd4-4984-9f35-4fb53692a266/tivekijebefeseloxezabun.pdfIn PDF document text
    • http://wofeginu.rf.gd/adobe_rearrange_page_order.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/how_to_identify_countable_nouns.pdfIn PDF document text
    • http://dalizavok.rf.gd/34814697486.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 5656 bytes
SHA-256: 118d0c7ecd433b0684eebd2434d9faf9d45765fe2febb71da66bd098692473c6
font_01_sfnt_off0000fe68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE68 10956 bytes
SHA-256: ad118f9dfdd7779ec845743de991ea02ce03241ce9c70c973d9ca9513944db18
font_02_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8