Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a34e08ee503006…

MALICIOUS

PDF

72.0 KB Created: 2021-02-17 02:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eef30fe32e4f2ed985752e5d064eb94a SHA-1: ac5794a47ce7db7fb0be39f6a7e7d7a91bead5b3 SHA-256: a3a34e08ee503006ba8c8652fb8798b897fcb863e39e93e78bb6f5bf3e310d48
226 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
  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/123?utm_term=stihl+leaf+blower+gutter+attachment+lowe%2527s PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369503/normal_601362e264adc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497081/normal_5fdffa1a0d7b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_601c676147c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_600fabec36106.pdfIn PDF document text
    • http://loginwithfb.site/solomons_organic_chemistry_10th_edition_solutions_manualn1x4o.pdfIn PDF document text
    • https://bazunebusa.weebly.com/uploads/1/3/5/3/135397504/wasit.pdfIn PDF document text
    • http://agencymedia-ig.com/58138827222j0mou.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/8b0ed907.pdfIn PDF document text
    • http://tekdouche.xyz/adobe_printer_free_windows_74hvhu.pdfIn PDF document text
    • http://scarcebook.com/182334864868exn4.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/6300590.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484097/normal_6007d37bf3e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5fd7dc90e1f76.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/rokuse-lubujijipona-jujurujatam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_600f546ba66a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 5664 bytes
SHA-256: 9ee4838149b8148dffb0ce63d5b7cb81a1d3263b857412e09d7320cf2adac079
font_01_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 10816 bytes
SHA-256: 9152ee0b3e6e058ac7efa767dec87a47dc52c94079f570ee7f38855c873849e3

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