Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a6b5fe1127f4d2…

MALICIOUS

PDF

75.9 KB Created: 2021-02-22 22:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fd1ce0cabfc79464bdd370be492ac649 SHA-1: 40c5c63893e9221b8f70a847d82126b58bbfaab2 SHA-256: 70a6b5fe1127f4d29f1fa6e1167e4071a6d221a1afbc95bf8720c740fe4b1c54
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jottigo.ru/123?utm_term=beats+studio+2+wireless+battery+replacement PDF link annotation
    • http://topplafond.xyz/bri_mobile_gratis05tf0.pdfIn PDF document text
    • http://micrometerdigital.xyz/9291862477607jrl.pdfIn PDF document text
    • http://tryadasert.online/1493709551702lr9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fccb52ac3242.pdfIn PDF document text
    • https://mibinataxufix.weebly.com/uploads/1/3/1/4/131438539/nuzoteguxo.pdfIn PDF document text
    • http://optalpha.com/51699290116e3kwt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_600bda1231b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462732/normal_5fe7ab896208d.pdfIn PDF document text
    • https://tosulabemolajeg.weebly.com/uploads/1/3/1/8/131871730/pilabakesukixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417980/normal_6004c1cacee2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5fd07f576589c.pdfIn PDF document text
    • http://storeplus.pro/loreal_hair_color_extender_instructionssmcdt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fcd9cd614b39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5fd61f8b25c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481841/normal_5fc6cb1508946.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_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 5736 bytes
SHA-256: 1d7d4c0a6910413d2444ae91f314dc4c3fd3fe50d417a0ddc3da0d5753855820
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 10644 bytes
SHA-256: 0bd89e13b5bf8ddbaa8c0167b59305813ede6a7ae3cc96af3ac70f97fd01a374