Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf4c82e7ed7f79b…

MALICIOUS

PDF

72.2 KB Created: 2021-01-13 02:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1df135d89f0754fbe54657e457a412a0 SHA-1: 7712a6738fb60597d1de78ef27440b3df69f0074 SHA-256: ebf4c82e7ed7f79b1ab558bfea7d8e11327ad708c04a27ef0518d8cda9b94425
230 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=bluetooth+driver++for+hp In PDF document text
    • https://daxefumusadaja.weebly.com/uploads/1/3/4/7/134763928/8336e66948.pdfIn PDF document text
    • https://ligiponofejejo.weebly.com/uploads/1/3/4/3/134346234/3a32b10f94.pdfIn PDF document text
    • https://senapuvuv.weebly.com/uploads/1/3/4/4/134459053/mizimugo.pdfIn PDF document text
    • https://gibunuvupu.weebly.com/uploads/1/3/4/7/134746488/8f2c9.pdfIn PDF document text
    • https://vowitaxarutivo.weebly.com/uploads/1/3/4/8/134870451/7a1e0d4a1de938.pdfIn PDF document text
    • https://mujeganivavubu.weebly.com/uploads/1/3/1/4/131406781/b525da659.pdfIn PDF document text
    • https://site-1177663.mozfiles.com/files/1177663/lokeba.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/vasofirida/futuz.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/game_drag_bike_cb_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/vimerexosenozuroriwevow.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/takealot_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/kxtv_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/94567951008.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/82656266543.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/lebubejumovudakipipepovu.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_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 4848 bytes
SHA-256: 12edc168511ff20aacf734d603719515395908586677449818a1f2968ae9fad7
font_01_sfnt_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 10748 bytes
SHA-256: 099b6cc7991a0293c7c87e0fea891c312a0c38550206fa926de8761bbe55c0bc

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