Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7506e7733c91c9…

MALICIOUS

PDF

61.9 KB Created: 2021-01-17 22:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0d041c1289a757f3585329fb32208abd SHA-1: f15cb88801577fa22073ff01b2cb94c2417b3c23 SHA-256: 8a7506e7733c91c9271215239493fa5f14f5fdaa91f77f2451d80d47fb6a086e
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/wb?keyword=cordial%20cherries%20queen%20anne In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486036/normal_5fe31b84c533b.pdfIn PDF document text
    • https://site-1175279.mozfiles.com/files/1175279/how_to_defeat_herobrine_in_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/ib8khfU/6249082325.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/hejh7jg/zakalokadodagogoxokofaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5fa53a2852c69.pdfIn PDF document text
    • https://cdn.sqhk.co/gadakoferupa/gj6hgYv/viwuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5fc8b078f0d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8b903ce645a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410714/normal_600009bb24266.pdfIn PDF document text
    • https://wovenatoz.weebly.com/uploads/1/3/1/4/131454427/vevobowenese.pdfIn PDF document text
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/xirifawepovofi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500665/normal_5fc47665b5a09.pdfIn PDF document text
    • https://site-1172655.mozfiles.com/files/1172655/4_pics_1_word_469_answer_5_letters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f8d00a42db2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fcc0e820e57e.pdfIn PDF document text
    • https://nevidabaxava.weebly.com/uploads/1/3/0/7/130775666/2536047.pdfIn PDF document text
    • https://site-1171784.mozfiles.com/files/1171784/infinity_gauntlet_stones_images.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/j4jggj7/71394559377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DB 5056 bytes
SHA-256: 723870e65df0760b3277a97e693a8396aff2500fe2d5b2e29aa8b181a4b6ef01
font_01_sfnt_off0000c4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F9 10852 bytes
SHA-256: cdb15566756bcd39995c58ebe959583b8418f0db3752eb9393ae77631adb5d19

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