Malicious PDF — malware analysis report

Static analysis result for SHA-256 0082f2daa343d974…

MALICIOUS

PDF

89.3 KB Created: 2021-03-27 17:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cfc7b363defafcbdb590504889ce7350 SHA-1: 1154b4d57842d3e60af21e3b9738e2e2073c2d81 SHA-256: 0082f2daa343d9743e2dc3ac2385f43fa2d15410d525e8b211f15de63fbaf81d
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 0.9996

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://midufefew.ru/strik?utm_term=why+won%2527t+my+troy+bilt+mower+start PDF link annotation
    • http://dosefokinuvulo.mypressonline.com/81997822302.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/titulos_de_credito_definicion_doctrinal.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/tLgcwUi/control_products_fa-_d2_deluxe_freeze_alarm.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/4543830463.pdfIn PDF document text
    • http://losinglotterynumbers.com/denodizowuvopurureveu83nd.pdfIn PDF document text
    • http://mibikazut.mypressonline.com/ssc_quantitative_aptitude_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/ja3ONig/vintage_race_car_number_stickers.pdfIn PDF document text
    • http://talebakela.iblogger.org/pokazamedefew.pdfIn PDF document text
    • http://forsage.pw/my_btc_accounto4e29.pdfIn PDF document text
    • http://becloud.website/bradley_electric_smokers_for_saleoj7fi.pdfIn PDF document text
    • http://freshnatur.fun/42336384199bcpt0.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/amharic_dictionary_book.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/ljd4zg6/metorekanefasozavuwo.pdfIn PDF document text
    • http://vuvuga.xyz/lukufibafetowena95hmi.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/jimxhC9/vovufasatodudorufijoxase.pdfIn PDF document text
    • http://netlysy.online/givilozezu0n8i1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puloxivomavari.epizy.com/31272517296.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/xaxubewevifusuloxabe.pdfIn PDF document text
    • http://lokutoge.rf.gd/64026202872.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/bio_rad_image_lab_software_user_guide.pdfIn PDF document text
    • http://besuwodusibix.rf.gd/form_of_stored_energy_is_called.pdfIn PDF document text
    • http://lawiferow.myartsonline.com/rofelogedasefileturosaweb.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_off000120b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B7 5308 bytes
SHA-256: e9efdf322d886c9f3a145f169220114edfd6dd8fec281af2285e659e6d67e380
font_01_sfnt_off000132b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B5 10872 bytes
SHA-256: 717b494a7ad16c21e16918e53adf835ff4462c3733ae161893b96052bd087522

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