Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10c19290fabfb7d…

MALICIOUS

PDF

73.0 KB Created: 2021-02-19 15:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3ee8c74c43c6b9200e41caa93b098ae0 SHA-1: b039fadc4912d41ad9af23bf99fed2c0cdb50ebe SHA-256: b10c19290fabfb7d46f593e7a234faa0608991cdbe35714784ffcea299ff2d22
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://yafferge.ru/wix?keyword=free+radio+apk+without+internet In PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/618026.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/jhb7haa/bezudelixefik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_60095319ce012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_5ffdb82ec6e3e.pdfIn PDF document text
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/bowezenomedegon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5fef6d6e6a991.pdfIn PDF document text
    • https://cdn.sqhk.co/xamubana/jhhaLgC/42828068952.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/HdAq5hf/502935959.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/eifyVjf/your_e_top_up_card_t_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476590/normal_5ff680f6d85db.pdfIn PDF document text
    • https://kefuluseze.weebly.com/uploads/1/3/1/3/131398598/3498507.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/2idihia/84547318326.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/5hfeij6/pineapple_pen_game_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5ff632eb42623.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/bejexe/mailing_list_spreadsheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/english_p1_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/botuxitepatugilit.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_off0000e33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33F 4948 bytes
SHA-256: 8452cf710638a200c4f32468be880605428a7883af2729c4a63f466cda8e4ed0
font_01_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 10084 bytes
SHA-256: 67d27b84dfe1c5c87af3348b9af8d1d1a0a96d026f34172187e42c49d45042c2