Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ea1b7d58d5daf0…

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 01:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b9d65a5e65d123c273c1d036f1b47c94 SHA-1: 9e4d7024492ef5ce7f18d2fc1716ad07f6112155 SHA-256: 58ea1b7d58d5daf010863effd6389fd5054471fac29f70d322ef9fdbd621a967
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=how+to+use+black+jack+hydraulic+bottle+jack PDF link annotation
    • http://xuzanuwije.22web.org/apache_lucene_tutorial.pdfIn PDF document text
    • http://im-marceting.site/travis_picking_patternstaqvy.pdfIn PDF document text
    • http://mxsale.info/enchanting_guide_minecraft_2019pb8xb.pdfIn PDF document text
    • http://mon-compte-cmb.best/vazojuvuwuvebabufol0r17z.pdfIn PDF document text
    • http://theboldpantsproject.com/smokehouse_products_little_chief_front_load_smoker_reviewsztvn3.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/bixuwewo.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/debajabixi_jojetuke_rogukilala.pdfIn PDF document text
    • https://lokogupata.weebly.com/uploads/1/3/5/9/135959524/nogefulovajotan.pdfIn PDF document text
    • https://mekebibarefuj.weebly.com/uploads/1/3/5/3/135335096/jisodutivexedar.pdfIn PDF document text
    • https://wemavejuza.weebly.com/uploads/1/3/4/6/134689468/6695218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botalibinizor.rf.gd/chorale_from_jupiter_piano_sheet_music.pdfIn PDF document text
    • http://duximamezuzef.rf.gd/how_do_i_connect_my_epson_stylus_nx230_to_wireless_network.pdfIn PDF document text
    • http://bekujosekufeto.epizy.com/visual_studio_analysis_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4eb57d-2d63-4925-9209-007b76a5cf82/xoboji.pdfIn PDF document text
    • http://tefuguwo.epizy.com/dobemoxafufe.pdfIn PDF document text
    • http://delebabumevam.epizy.com/59014760021.pdfIn PDF document text
    • http://mulemakupizaru.epizy.com/class_9_english_moments_chapter_10_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f1f40a-101f-4cae-b006-b6c4ac66f909/15386472367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5a48d4-69f4-42bb-aad5-6f67c7a0cf99/logitech_z-2300_computer_speakers_control_pod.pdfIn PDF document text
    • http://nufaviziziji.epizy.com/48412043127.pdfIn PDF document text
    • http://pujifobekef.epizy.com/venajutowilewubade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cf6f9c-9474-40ff-ab2d-c4749b674002/zuzozobesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc12f3b-de8b-4b8e-910c-c65bb607dcd0/yamaha_rx_v473_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd69542c-0a0c-4074-beab-d6f43cbd45f4/zagg_folio_case_ipad_pro_9.7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b033bc5c-375d-4a99-ae65-6ed380e6c0ac/65050384370.pdfIn PDF document text
    • http://kemuvatixas.epizy.com/japijifabojolamefubemew.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_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 5464 bytes
SHA-256: 2de161ec695abf562e89ba699ad585434b57f0556b8e5e42d4f2f90e8d6c02b3
font_01_sfnt_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 10252 bytes
SHA-256: acb280803104e60d37d2181a1a0274fde0e8af545074d6a9611889bf7dd6a3a3