Malicious PDF — malware analysis report

Static analysis result for SHA-256 417e9fbff1da686b…

MALICIOUS

PDF

82.9 KB Created: 2021-02-27 21:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 147e10c0436af0a3b977a981c5d5d4b5 SHA-1: 131b5ec1ad28f65f9beedf5979642323713351e4 SHA-256: 417e9fbff1da686b3df8d959383654a47dd53cda1854ea8f2a528a6a186ed7f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/123?utm_term=descargar+musica+yo+te+esperaba+de+alejandra+guzman+mp3teca PDF link annotation
    • https://pemejelusapi.weebly.com/uploads/1/3/1/3/131398576/giponizonovose.pdfIn PDF document text
    • https://musazejat.weebly.com/uploads/1/3/1/1/131164110/b2b82d041c398.pdfIn PDF document text
    • http://zirirukefup.22web.org/text_formatting_attributes_in_html.pdfIn PDF document text
    • http://alexsaf.ru/eliason_easy_swing_hinge_templateoinn6.pdfIn PDF document text
    • https://jinajifija.weebly.com/uploads/1/3/4/8/134889339/lokekabuj.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/hcwiaUy/university_of_montana_law_school_class_profile.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/31ed68.pdfIn PDF document text
    • http://baffer-shop.space/10739597362irbms.pdfIn PDF document text
    • https://fajalosi.weebly.com/uploads/1/3/4/9/134901252/d61dfec5c5ad4e.pdfIn PDF document text
    • http://lemovifi.iblogger.org/nespresso_store_upper_east_side.pdfIn PDF document text
    • https://vogavova.weebly.com/uploads/1/3/1/6/131606390/xilosuxiruroxek.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/waxel.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/fourth_grade_math_sheets_printable.pdfIn PDF document text
    • http://latencfsrt.space/82216111030h57wg.pdfIn PDF document text
    • https://mujekakuvegaxum.weebly.com/uploads/1/3/2/3/132303245/1476493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuneviwek.epizy.com/all_american_930_canner_for_sale.pdfIn PDF document text
    • http://fokibofu.epizy.com/concierto_de_aranjuez_guitar_part.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_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 5924 bytes
SHA-256: a900ccd10f0cd1ca57cbd285654534b0542c1f5bb15a4e6f88956d5406fd93e8
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 13048 bytes
SHA-256: a4b3570e53d384683a0706946d299e042293933facaafb7ff816687bff60b8fa
font_02_sfnt_off0001263d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263D 16852 bytes
SHA-256: 865b158fb629688c8f4c9401d116b16933c8725510474d77840a9697678027b6