Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53cdef94069b7d3…

MALICIOUS

PDF

50.3 KB Created: 2020-10-11 06:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 353b2867530b2e7c8fe406de83e0ecd8 SHA-1: 4109f7fdeb9327012b7f308b4828ad3b40753862 SHA-256: d53cdef94069b7d328a6825cb9c7b7fed61a4bb05d64b800943ff1ab7c524a9d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.club/pify?keyword=christian+service+hours+ideas In PDF document text
    • https://site-1048245.mozfiles.com/files/1048245/davukudevaronami.pdfIn PDF document text
    • https://site-1040249.mozfiles.com/files/1040249/xorugesuf.pdfIn PDF document text
    • https://site-1039274.mozfiles.com/files/1039274/gafekasakub.pdfIn PDF document text
    • http://ruxusa.inspiredbybaking.com/uploads/1/3/0/8/130873915/nuvesama.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/4760e148-b9cd-42a3-b823-4c912fbd7c9c/19898822213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5199304-006d-4624-973d-331cf3d4019e/6663262516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2a6928-3662-4020-a1fa-3c10f0404d78/dalivamodituj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8eb1421-c214-4511-a552-17adfe1a432d/fufifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f78f90-7343-45d7-a362-159944abceaf/beloxawipojelegodolosi.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_off0000895a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 4960 bytes
SHA-256: 83f3d1df8c868f0eab87d2023c454daa4a97ba00f26b58a9c87cda9c1669e0cd
font_01_sfnt_off00009a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2D 10140 bytes
SHA-256: 4d46478960d28af3e1b60177070036353259783ef4b8a56737a67d09f51580a9

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