Malicious PDF — malware analysis report

Static analysis result for SHA-256 75089e3941054f3e…

MALICIOUS

PDF

83.2 KB Created: 2021-04-06 00:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 56bc07ec1a3fd913248efa4accf33d6a SHA-1: 0834a4ceb53e40e982ee0ea4f56fd7371e1b6fa8 SHA-256: 75089e3941054f3ec7408ae6c456702d09963d79048cb9c9a4b9919a53086130
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs pointing to various PDF files hosted on disposable domains and Weebly subdomains. This pattern is commonly used to distribute phishing content or redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://soxebez.ru/award?keyword=ansi+denial+reason+codes+pdf PDF link annotation
    • https://nukanomipixi.weebly.com/uploads/1/3/2/7/132740264/bd8af0f56.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/eed4dd3f4aaf0d.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/86870830235.pdfIn PDF document text
    • https://veralekixa.weebly.com/uploads/1/3/1/0/131069874/df8d21be.pdfIn PDF document text
    • http://getliterate.online/38009787486l3ggt.pdfIn PDF document text
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/26931.pdfIn PDF document text
    • http://italy-small.space/escape_room_level_38_answer_appauu7z.pdfIn PDF document text
    • https://daxuvinu.weebly.com/uploads/1/3/2/6/132695190/nebenejire_didefemugis_tetafojaj_mawodurode.pdfIn PDF document text
    • https://monoxute.weebly.com/uploads/1/3/6/0/136051008/xeziwifus_zekuvozukuk_tisisadomulez_filefusezodete.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/proyecto_de_investigacion_tecnologica_ejemplos.pdfIn PDF document text
    • http://sis-paypal.com/8_ball_pool_game_free_coins_linkjsk80.pdfIn PDF document text
    • http://kungfumalibu.com/501461523753ol1v.pdfIn PDF document text
    • https://redodire.weebly.com/uploads/1/3/1/4/131408340/xaxoji.pdfIn PDF document text
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/c8b383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kifesafijupesob.onlinewebshop.net/39856158289.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/mathematics_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/pet_sematary_stephen_king_cameo.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/bafumupupodogobowobu.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/powerful_worship_songs_nigeria.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 4844 bytes
SHA-256: 58d7505512b680217ce17787163cb3338c9d9e15dfc20421543de067abc6e668
font_01_sfnt_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 10860 bytes
SHA-256: 286493e051d5da40cc8b163032dd624b73a7c2f3e18e2861189158d43299b4fd
font_02_sfnt_off000131d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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