Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b0f375d6819e62…

MALICIOUS

PDF

85.9 KB Created: 2021-03-07 06:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: dd7df437ba3f3bcc4fdd7b885dca356d SHA-1: 76b6751aafa375b70b5e638fa16cf365145d5a94 SHA-256: a2b0f375d6819e626b5dafc0ed43a88d6b518d008285204b335de37af5dc6050
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links, including the primary IOC `https://xezojetit.ru/wix?keyword=nacho+libre+bike+for+sale`, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'nacho libre bike for sale' and the wkhtmltopdf application, indicating it's likely a lure document designed to redirect users to malicious sites.

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 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.
  • 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://xezojetit.ru/wix?keyword=nacho+libre+bike+for+sale PDF link annotation
    • http://jenuxijaf.mygamesonline.org/dominos_pizza_allergy_information.pdfIn PDF document text
    • http://aycotoro5.xyz/los_cuatro_acuerdos_de_la_sabiduria_tolteca3tz25.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/datoxaxowemu.pdfIn PDF document text
    • http://depusapo.mypressonline.com/patek.pdfIn PDF document text
    • http://goshop32.site/17399330117vlsqj.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/fichas_de_trabajo_de_lectoescritura_para_primer_grado.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/ariens_st724_snowblower_owners_manual.pdfIn PDF document text
    • http://shopmzm.site/fekuwuvezelumecvek0.pdfIn PDF document text
    • http://idealica-co.site/mfj_259_service_manualxgr4l.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/how_to_tell_when_to_pick_sweet_potatoes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_addea670301443bdb938ec64006f848f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/manual_de_bacteriologia_facmed.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/practical_english_usage_4th_edition.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/wawowulevazidajedidufige.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/xazivi.pdfIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_2e9e4ff677a943bfbbd49ee7aec8d830.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/best_opera_songs_of_all_time.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/janapadalu_naa_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/tuwiwovuzovovubipofopemiv.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_44b3e3412e4f4d479b416318b3133630.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/25082533381.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/android_studio_emulator_mac_os.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_off000112b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B0 5140 bytes
SHA-256: 91f5fd16e7bf616376515f9e6ffc3347a38d17beb01d8226ab17470d68110d6b
font_01_sfnt_off0001242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242D 11308 bytes
SHA-256: 3c10af5485c4701cea346108e5df2dbde36ff693db77df1be8cfa0779800cbb4

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