Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e158b4b9a30913…

MALICIOUS

PDF

71.5 KB Created: 2021-01-23 08:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f78aee3fe87c2700ea83c9a36430e78b SHA-1: 58e8b8758221a380bbd7d43522145ce60b5e92fc SHA-256: 39e158b4b9a30913b96d413c4ad182acf57878f1cf960934f35623f125518271
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/123?utm_term=american+laser+center+san+diego In PDF document text
    • https://vupebuxotilejo.weebly.com/uploads/1/3/0/8/130814562/4b78f1d.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/mokage.pdfIn PDF document text
    • https://libepuve.weebly.com/uploads/1/3/1/4/131407284/nefopuxopipuboju.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/zufaxepixiguxax/message_backup_for_facebook_android.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/noniwexisodowisuvaponigem.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/lake_bled_slovenia_tourist_information.pdfIn PDF document text
    • http://kudogato.rf.gd/visual_c_2013_redistributable_package_x86.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/dante_s_inferno_psp_save_data.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/4886202339.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/p_l_and_balance_sheet_for_dummies.pdfIn PDF document text
    • http://xitutudatiri.epizy.com/71768822111.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/46422323877.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/newixamuxitedibusedo.pdfIn PDF document text
    • http://pususarejopo.epizy.com/sap_netweaver_7._40_installation_guide.pdfIn PDF document text
    • http://velawomonoxejuz.epizy.com/9517093452.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_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 5248 bytes
SHA-256: 20c6b91b432988bd4a14968c11f7173ae1f545cb1a6fe1e5f9c2938013da935d
font_01_sfnt_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 11024 bytes
SHA-256: 6810e1031161363a53b1b0f610220d09d9e0abf1404a9a8b19fff8592a826386