Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d0bf9b94627af5…

MALICIOUS

PDF

74.8 KB Created: 2021-04-05 20:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 775a3e63d7a022a19e49449d04852332 SHA-1: 5b74fba9f3bef5bcfe2dde159cf0aa21a5c47027 SHA-256: a3d0bf9b94627af5d532116d13c4fdfa732825b3c55a31eb6139fe60eef96f7f
74 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=treasurer+report+template+word PDF link annotation
    • http://ourfanz.com/fozejudujiqcly8.pdfIn PDF document text
    • http://rasojupalipi.22web.org/45381248401.pdfIn PDF document text
    • https://jikonoligozeg.weebly.com/uploads/1/3/4/7/134755459/lalidiwilat.pdfIn PDF document text
    • http://kaginiluzima.22web.org/kevilofibibozejoweludid.pdfIn PDF document text
    • https://xapezojukigese.weebly.com/uploads/1/3/1/4/131453407/305f5568d567b50.pdfIn PDF document text
    • http://itravelgr.com/40319799809yxee.pdfIn PDF document text
    • http://lobutojumakix.22web.org/diziwexivurinapovumezolu.pdfIn PDF document text
    • http://badge-verification-center.com/miwozozofa9kyoy.pdfIn PDF document text
    • http://rigajupuseb.iblogger.org/can_i_do_istikhara_in_periods.pdfIn PDF document text
    • https://laxedojopepab.weebly.com/uploads/1/3/4/8/134896069/a85966f3f14ab.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/8733c0d8-b2b9-474f-8745-4c17cc138a9f/love_languages_physical_touch_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61968824-2cf1-4837-afd9-913ad562c5f5/gift_ideas_for_grade_1_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3bb1b9-62c4-4f6f-a130-480cc587d83c/500_basic_korean_adjectives_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46aa5f19-cec8-4c67-8a00-3421fe7e0f51/advaita_vedanta_books_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d615cd-d53a-4d0d-8dda-7caa3732fe16/gofawuwonawib.pdfIn PDF document text
    • http://wufijimo.rf.gd/pip_claim_form_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bab2fe-534a-4bde-924d-5bbcb0dfa4ae/zelufupipolejos.pdfIn PDF document text
    • http://pomixaso.epizy.com/caracteristicas_de_la_anemia_falciforme_wikipedia.pdfIn PDF document text
    • http://pepukogabam.rf.gd/free_sample_behavioral_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b27d36-aec5-4edd-b278-a373aeec09c9/20050725225.pdfIn PDF document text
    • http://jubalagifagusop.epizy.com/frequency_polygon_worksheet.pdfIn PDF document text
    • http://tezadoni.rf.gd/flowers_name_in_english.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_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5148 bytes
SHA-256: 9500c267520e3602813573b77adf2c31b96a1582a9dc1a76131a1df0a8770416
font_01_sfnt_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 10568 bytes
SHA-256: 64f40079a374d9c30dca26e7f1354b4476ddd0bf00304f3013db0fb946ef9332

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