Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6ad04a5aa7861c…

MALICIOUS

PDF

65.2 KB Created: 2021-02-14 12:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 59df8ff87480951c368ddf833e0c937b SHA-1: 4af1a09a00e4cce977ba2dcb3119721171f6b3b7 SHA-256: 7f6ad04a5aa7861c9edf30cee20c0b78bd1d2fe7d006b1ea6420c104276f3ecb
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://jacksth.ru/wix?keyword=blue+nose+pitbull+puppies+for+sale+in+chicago+illinois PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5ffe6ec2c45b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383804/normal_5fca3d86479d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_5fc7157061f70.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/phhOm9J/37221831220.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/gfjjhbV/limulijaxetexetudob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fda8ab227bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5fe99cfd4fca2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374533/normal_6005e6fc7b8aa.pdfIn PDF document text
    • https://cdn.sqhk.co/raxulaxesob/ibB9kic/joforigupivuzudevaset.pdfIn PDF document text
    • https://tavadarikozo.weebly.com/uploads/1/3/5/9/135987174/d39d6fa5a51749.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/8780654.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/7a150f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fc9a965a85e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kalogoraretupo.epizy.com/golwala_clinical_medicine_book.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_off0000c211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC211 5468 bytes
SHA-256: db6a8d1618ac396d108785e816dc0006b05c31ac7cdae4da481ad3f63185139b
font_01_sfnt_off0000d4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 10364 bytes
SHA-256: 22baa08d6cafdb933fe0dd26c450874a72de86bcb9c79713b1dd625180d37a00