Malicious PDF — malware analysis report

Static analysis result for SHA-256 664f07437087195c…

MALICIOUS

PDF

71.0 KB Created: 2021-03-19 19:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eb163f2d9fe7d44b7af2712a512f4df SHA-1: d4f31cffd8554ab2de6803b6043537b80c27f086 SHA-256: 664f07437087195cdd443200e11bc84893c85d78e1dd5625c45f8a73c2146766
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a large number of external links, indicating a link farm or phishing attempt. The primary URL observed is https://zajinet.ru/strik?utm_term=harry+potter+advent+calendar+2019+day+21, which likely serves as a lure or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=harry+potter+advent+calendar+2019+day+21
    • https://bobazuforabi.weebly.com/uploads/1/3/1/4/131452976/389bb72a5b4.pdf
    • http://gugezebaz.mygamesonline.org/tylenol_davis_plus.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/nomibu.pdf
    • https://retezuve.weebly.com/uploads/1/3/2/7/132741149/4328771.pdf
    • https://labivuzixifazer.weebly.com/uploads/1/3/4/3/134310915/170d63968a.pdf
    • https://jirixakevafu.weebly.com/uploads/1/3/4/4/134404576/mirosodeze.pdf
    • http://pararapameso.getenjoyment.net/zavugugeru.pdf
    • https://nujiwabovis.weebly.com/uploads/1/3/4/7/134728222/tamuruwetoloma.pdf
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/9e4d545.pdf
    • https://zobujopexa.weebly.com/uploads/1/3/0/9/130969678/2210440.pdf
    • http://komaxinatobofe.medianewsonline.com/maleromen.pdf
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/wozikemitax-desenev.pdf
    • https://zurirepazigotot.weebly.com/uploads/1/3/0/9/130969164/af748b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/192b0bea-46b8-4b09-a3a3-ff85d46c3e36/90500905348.pdf
    • https://uploads.strikinglycdn.com/files/5c80e3d7-1b51-4702-9383-3b63f2e8f984/how_to_align_canon_printer_mx490.pdf
    • https://uploads.strikinglycdn.com/files/edd4c6e0-407f-40b1-97cd-66f4cbccf595/74378051260.pdf
    • http://zobotipuzadevi.epizy.com/88161253787.pdf
    • http://nixomirorubu.myartsonline.com/how_to_install_windows_10_operating_system.pdf
    • http://zapofekeba.rf.gd/faravimufunarofore.pdf
    • https://uploads.strikinglycdn.com/files/a88c79fc-1f29-4976-8405-40df49a944ba/bidewaxakuzedev.pdf
    • http://mowoled.epizy.com/astral_projection_guide_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ba.bin
4e9a4fb1524edc00cfb2ae79836ff888d1d5c31a856c470301944d8d686996cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BA 5496 bytes
font_01_sfnt_off0000ea8f.bin
45e2025b26993e6f1affc7d1e9f38f0d4eadee69861b3354f7d98c0cb752d07e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 10624 bytes

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