Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1084fd5099c62ac…

MALICIOUS

PDF

72.8 KB Created: 2021-02-28 06:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c8dea045f168ed5471ebfad55c7b317b SHA-1: 73105ee52aa5104e918b9c3d6d06f1403833a788 SHA-256: c1084fd5099c62ac7428dd458456e6cec770ea4c212952773b62254a26ee554b
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/award?keyword=hampton+bay+window+air+conditioner In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5fdde4dd526bd.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/nalawulepobuve-lokuwiwu-jixewoviluwuler-gigikanezozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426410/normal_60020083d4186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5fe4eb4e7ad74.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/chhjdwF/bowling_xmas_party_london.pdfIn PDF document text
    • https://selemuja.weebly.com/uploads/1/3/4/8/134893326/4fd5a6c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_6034d09fbd7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5fdbcba81dba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_60261fa5956c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504788/normal_5fca360659a3c.pdfIn PDF document text
    • https://fiwadevu.weebly.com/uploads/1/3/4/5/134592392/reviduza_kajofobuwewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/angry_birds_movie_soundtrack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/14825944843.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_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 5304 bytes
SHA-256: 294c980629a287698c24769d37f989f1aaea4e40094e22c922382a7af3611b66
font_01_sfnt_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 10012 bytes
SHA-256: 2fcb2f1a8747d7f99353b8d1f3eadb2a82a201481ce0dc8a62ab6778e9b5dd1c

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