Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce1c738e860f5e1…

MALICIOUS

PDF

84.1 KB Created: 2021-03-18 06:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 229249704cd4e7009b075024d4486c6a SHA-1: 301627e93044138e0951ca74c1f0e0ce350801c8 SHA-256: 1ce1c738e860f5e163c162811529b11c4df0ae6ba2e422d578dae584d5e6e45b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign-looking PDF files, suggesting a link farming or SEO manipulation scheme. The primary malicious URL identified is likely used to host or redirect to further malicious content. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF structure itself is flagged for containing a mass external link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/wix?keyword=nightfallen+rep+farming+guide PDF link annotation
    • https://pomegikupabuvad.weebly.com/uploads/1/3/4/1/134133078/lanitojakixubonupu.pdfIn PDF document text
    • http://nutristrike-shop.ru/detimoduforexitomazoujoyp.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/rezozazimisoten_vadamin_purok_dugisefakeju.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/450_word_school_spelling_bee_study_list_2020.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/horoscopos_profesor_zellagro_sagitario_tauro.pdfIn PDF document text
    • http://genusadnlo.space/how_to_call_forward_on_avaya_2420zj3gn.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/vokijijo.pdfIn PDF document text
    • http://rajajime.mypressonline.com/10651012698.pdfIn PDF document text
    • https://puvugemamoj.weebly.com/uploads/1/3/0/9/130969199/dagodujafobewizol.pdfIn PDF document text
    • http://presente-top.store/56414327724ongup.pdfIn PDF document text
    • https://lavivatum.weebly.com/uploads/1/3/1/4/131437335/botovo-bibogumimodo.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/jifojexu.pdfIn PDF document text
    • http://kinorio5.xyz/ottlite_stopped_workingfva8q.pdfIn PDF document text
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/zorulolisavakumoxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/sears_kerosene_heater_model_583_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/premiere_pro_13.1_download_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/54594038570.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/agerigna_keyboard_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/how_to_connect_plantronics_m70_to_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/kathi_mela_kathi_album_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/43988527066.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/bojafizasuralagi.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_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 5244 bytes
SHA-256: 1055428da953a2c8299b0e93b9c659ba71718435e9ab96b9dbeb40e674f5a317
font_01_sfnt_off00011be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 11408 bytes
SHA-256: c8be99c9c7b36e7c682182a38d74dba630c7721c98ccd17295abfea41fdbbba2

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