Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7743a5ad33147eb…

MALICIOUS

PDF

79.0 KB Created: 2021-01-31 19:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e913d8bc51452f0225564496acb897e7 SHA-1: a5bb466a15f9f3e48db70527210e82f1676149db SHA-256: c7743a5ad33147eb47b79d7255611869f044c82d9bdc78c63690ecb3c210edd6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/aws?utm_term=belmont+report%2528+1979%2529 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452846/normal_600547d938997.pdfIn PDF document text
    • http://bet-info.ru/planescape_torment_ee_mods64jev.pdfIn PDF document text
    • http://italiabeach.space/recharge_metro_card_online_mumbai214dl.pdfIn PDF document text
    • http://mritzoliver.design/13641509498epfbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5fea24371c18e.pdfIn PDF document text
    • http://pollsexpert.com/negative_binomial_expansiongikit.pdfIn PDF document text
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/jirojitowe.pdfIn PDF document text
    • https://gerunujixode.weebly.com/uploads/1/3/1/6/131606408/karajuwedowuv.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/xiwanoton.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453885/normal_5fee9baadfec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fd9113e8f770.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/7f6699.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_6007e64f9f449.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/gewisetug/68357156763.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/cfpb_hmda_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/chirutha_telugu_video_songs_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/2597650033.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/90064034299.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_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 5068 bytes
SHA-256: 27ef2c7867ae30bd9544a522c2edc8330c9db46e15befa8a81a9dd5383766c9f
font_01_sfnt_off00010b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B64 10392 bytes
SHA-256: 1508cc818af24f0c1d6b9ac5dfa020edb0979d5fd9d2988f73dfd1e05dbf622b