Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbaf893cbf3ac6fc…

MALICIOUS

PDF

72.2 KB Created: 2021-02-14 07:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 535b8621dbea6c68da843b5d40080963 SHA-1: a8218767f843a716eb3ecf0feb253c648a7dbe2c SHA-256: cbaf893cbf3ac6fc060d0f21e5af804d32b795b21ea8ff90f64b03eb04a41439
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/wix?keyword=sean+hannity+1+800+flowers In PDF document text
    • https://cdn.sqhk.co/kagawupatow/jcQmidt/46458274957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_6012098e88597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5ff1cf11b33ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_6013191a3aa0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_601d06549b179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462696/normal_5fd182f05a5a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_6018b023b0055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_6008f83a01d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_6012c3bcedacc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383573/normal_5ff3e6fe22ab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_602412ebe2fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497359/normal_6023f13d8d705.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/fifd7tD/25057505627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5fd116e107ae9.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/hoMtPji/new_sad_ringtone_2020_tik_tok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ffc0215cc154.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/zopenave/flipping_death_challenges_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/agenda_2019_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/supreme_sweatshirt_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/12726310471.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/89363749602.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_off0000dd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD31 5540 bytes
SHA-256: a2478c67f9e1f6f61940d040c0476d730f291dc12e1e21bf54e2e251194a079a
font_01_sfnt_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 10420 bytes
SHA-256: b481a0fa4bbb738bec8f329123403e45233718c28c15110b6f59cab7f97112d7

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