Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6cbc11b226ad59…

MALICIOUS

PDF

67.1 KB Created: 2020-11-19 03:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 234b2f6dc643d733c679f75e153676fc SHA-1: a87c29396a17be3e6ca9d915919cc7074f5fe3f8 SHA-256: bd6cbc11b226ad59517d8af22df0249e0ccade12a3035a0666e4f9706adafe94
254 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
  • 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://traffine.ru/aws?utm_term=letterhead+template+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fada3fb3d62b.pdfIn PDF document text
    • https://mazazogadof.weebly.com/uploads/1/3/4/3/134374066/3fdb32818c33cb.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/2232723.pdfIn PDF document text
    • https://tobotegitemusir.weebly.com/uploads/1/3/4/6/134651307/puvevowozi.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/gezumuwavizegekis.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/voxazedisula/ac3a7c3a3o_de_cobranc3a7a_de_titulo_extrajudicial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca44440-9051-4382-bb23-7335bd2ac798/89149128839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5aa1693-c294-4cc2-8320-a082e260f838/99323133353.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/loi_sur_l_amnagement_du_territoire_vaud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e389fd9-8e0a-45af-af2a-7fbafc9ce36e/relational_algebra_examples_in_database.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645127d6-0c08-4952-8b00-d97629dbf61e/nugubavatemewamesixab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7add1b9-7376-4d34-9dc0-092da84b38c6/6028254080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a07da4f-2381-466a-b098-b6d59804cc52/55338133526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa79d09-5895-4277-89a6-c3b12f2163fa/pugemipaderekosuxo.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_off0000cc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 5044 bytes
SHA-256: 2caa5ac6db76d443ac5260c96fb82274d31a218f2fe67b32b43efbcd32678a76
font_01_sfnt_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 10084 bytes
SHA-256: c0920f3196cbada1875aae731265ce1c64914c6fa64979de079c385c2f4048e1

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