Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77544ab8923d57b…

MALICIOUS

PDF

80.8 KB Created: 2021-01-01 07:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: b89ea2f2c236971e7fd0342e9f34fedf SHA-1: 6375f98c1ea50206f2ce2276749f656770cc9019 SHA-256: d77544ab8923d57b814c298e2e5d2579ace47ae33aab1afc9c47d62af9a0b3a3
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://traffnew.ru/123?utm_term=thidwick+the+big-hearted+moose+meaning PDF link annotation
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/54e155d5.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/fja9mha/paintball_gift_card.pdfIn PDF document text
    • https://dajepulexito.weebly.com/uploads/1/3/4/5/134591334/6791695.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/TgjAAom/kudujexavakubovu.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/hcgelIw/68234851174.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/RBex9BM/95499811368.pdfIn PDF document text
    • https://juxagoneponux.weebly.com/uploads/1/3/1/3/131384300/sasur_polowuget_wonumebiwekowu_betesifutuz.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.pdfIn PDF document text
    • https://gomejewenikugi.weebly.com/uploads/1/3/4/8/134869664/149799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5df127-c1ed-4bf6-8f15-55d9244d3de9/70361537449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d454ea-6f8a-456c-a57c-f07ae0f35d4d/transmission_shop_near_me_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dd4414-8a07-4d3f-b686-4bb32875897d/24079490896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d092dc25-94ac-4593-8137-69cf5bd778c2/jopimagud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f57d27a-dea3-40a6-b5fb-7bc4f1ede9a2/sofukezubujag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2636cad-85a1-4879-961d-9ffc6e82ff6c/a_girl_tells_her_mother_she_is_volunteering.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_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 5600 bytes
SHA-256: 3940d272697498a3d529c84afd1a9be2cba4546c6b22dae60af33547864fd989
font_01_sfnt_off00010e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E06 12248 bytes
SHA-256: 2df5a798fae74642070346026f2c57c59786b4c52d3a2ffecbcbc919e61985a3

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