Malicious PDF — malware analysis report

Static analysis result for SHA-256 a325d104deb614cd…

MALICIOUS

PDF

134.7 KB Created: 2021-04-25 23:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f3c6efdbf673a32e2dac56373b084525 SHA-1: 548c7b33b9a07ac9f7a05af5b57815ae490ae764 SHA-256: a325d104deb614cd5e2b077a064aa133d02d638cc8dc0112fc4a7eefb737c777
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 0.9934

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://lozipotod.ru/strik?utm_term=fanuc+31i+lathe+programming+manual PDF link annotation
    • http://ninujovapazolo.iblogger.org/data_structures_and_algorithms_with_python_kent_lee.pdfIn PDF document text
    • http://didazema.mypressonline.com/does_costco_have_car_seats_in_store.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/tv_broadcasting_technology.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/44876200910.pdfIn PDF document text
    • http://xivobivivupe.mygamesonline.org/pewise.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/bidart_campos_libros.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/tabla_de_conversion_fracciones_de_pulgadas_a_milimetros.pdfIn PDF document text
    • http://xelowonol.scienceontheweb.net/parlisis_del_nervio_facial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460723/normal_5fd717a759b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_602cd99b90614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_6030fa18d9d33.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/shop_vac_replacement_parts_lowes.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/job_hunting_skills.pdfIn PDF document text
    • http://ganirutejiz.iblogger.org/70790237921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://likutolejit.onlinewebshop.net/types_of_anaerobic_exercise.pdfIn PDF document text
    • http://falufobi.epizy.com/schedule_b_2018_form_1040.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/lolojigunojabenof.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/tourist_information_aosta_valley.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/migobodasowu.pdfIn PDF document text
    • http://duginefasozuna.rf.gd/8323612875.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/blackjack_table_for_sale_ottawa.pdfIn PDF document text
    • http://jixepazesobuno.rf.gd/47786718490.pdfIn PDF document text
    • http://xopiwimiwopuse.epizy.com/komuwirewedegiketex.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/photoshop_free_windows_10.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF6 3064 bytes
SHA-256: 07a5bdff45196f01e6e73d2a1df4c41e689339af30fcdbc102f8bc7ed66410fe
font_01_sfnt_off000196c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196C9 5340 bytes
SHA-256: eaf2d26564034b804509928bc1bc3ce419ca91c43937d8c6b0d0a2d8cb02359d
font_02_sfnt_off0001a8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8CB 6796 bytes
SHA-256: 2a030a3551cf0c42bcc937a1db0599d3a46bc14752bc09558952dbb4bdd3a158
font_03_sfnt_off0001bb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB2C 18400 bytes
SHA-256: a28135eb27f146c54f55d37c4c87100d3f580a543b486120b3da30074a941b1c
font_04_sfnt_off0001f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F365 16908 bytes
SHA-256: 1aeffe00ad752572577acca1d24c29a6cda2a5ebfcacd00fabb79c09386fa714