Malicious PDF — malware analysis report

Static analysis result for SHA-256 0646bbe9aed42177…

MALICIOUS

PDF

74.7 KB Created: 2021-03-05 10:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8ba40e3bf51ced259e680611524a599a SHA-1: d2ec522e2e70a44092d97a6f67a1d39f3e824189 SHA-256: 0646bbe9aed42177ea91b6a143278175b0085ab86e7d1e2437a52e192d75bae7
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external websites, many of which are hosted on disposable domains or known redirectors. This behavior is characteristic of phishing or malware distribution campaigns, where the document serves as a lure to direct users to malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=the+daily+trading+coach+audiobook In PDF document text
    • http://momsmall.space/66027084334vg3dc.pdfIn PDF document text
    • https://vosaxiwajikox.weebly.com/uploads/1/3/0/9/130969878/8936350.pdfIn PDF document text
    • https://vusuranozaxo.weebly.com/uploads/1/3/4/0/134012668/kikerojoz.pdfIn PDF document text
    • http://helpcopyright-service.com/xudusarolabipatuguweqrdxx.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/laxepebo.pdfIn PDF document text
    • http://setifol.66ghz.com/jsc_result_2018_bd_marksheet.pdfIn PDF document text
    • https://lulipexo.weebly.com/uploads/1/3/5/2/135294167/d37c9e59075.pdfIn PDF document text
    • http://copyright-services-us.com/what_da_form_is_a_weapons_qualification_card5g5sm.pdfIn PDF document text
    • http://wiinorama.website/what_is_the_lean_startup_modelymbhd.pdfIn PDF document text
    • http://world-wild-shop.com/441810855863rxkt.pdfIn PDF document text
    • https://bebezirowud.weebly.com/uploads/1/3/4/3/134371107/vikenusumapo-kapulakez.pdfIn PDF document text
    • https://pedumodab.weebly.com/uploads/1/3/1/6/131637036/vurufej-nosusopixejagi.pdfIn PDF document text
    • http://myyshooop224.site/chronicles_of_crime_expansioncwx21.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/36992e5f-fed0-47b6-a751-9517ded9ce27/suvepuburarasujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d018aed6-db1b-41dd-8149-d08a7e0266dd/97616991345.pdfIn PDF document text
    • http://buloderijapu.epizy.com/driverack_260_vs_pa2.pdfIn PDF document text
    • http://zowolowoziru.rf.gd/the_odyssey_book_1-2_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9e3af9-7b38-4d48-8800-5b87e49f4216/kitaruz.pdfIn PDF document text
    • http://zenejanewupuj.epizy.com/how_to_trade_bitcoin_on_luno_youtube.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_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 5280 bytes
SHA-256: 432e055b8dc69c35cb7dc7621dc366eb60b7e296f5dcf5b87bde679b4f8a0f76
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 10176 bytes
SHA-256: 328752371f3c985d60d33132e90090375846e99cb679d7e34541bc82fa6a0f19

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