Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0cc358f8620f8e…

MALICIOUS

PDF

87.6 KB Created: 2021-03-16 06:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1519e9fe1c95c5d116be450f0b5e061c SHA-1: 399d5ff969d15db17c418239729fe128fa3009c0 SHA-256: 7b0cc358f8620f8ed4f5504dc772477011839267c87c07a6b4d2b89f8a1751eb
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links designed to appear as a link farm for educational institutions, a common lure for phishing or malware delivery. Heuristics indicate these links point to known malicious redirectors and SEO spam infrastructure. The ML classifier strongly flags this PDF as malicious, and ClamAV identifies it as a phishing trojan.

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://dafemum.ru/wix?keyword=edenton+nc+private+schools In PDF document text
    • http://monstergym.ru/where_to_buy_summer_waves_pool9kjms.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/kironitejabadojan.pdfIn PDF document text
    • http://bbcua.site/wefiwigubizore3t2o3.pdfIn PDF document text
    • http://vnds-super.space/football_referee_shirtsrcw63.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/86082226166.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/3f780b3139ce7cc.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/osaka_castle_park_japan_guide.pdfIn PDF document text
    • http://zespodsvetkoy.site/how_s_it_going_yahoo_answersmdwyq.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/tonulilifuzegavunuvazovig.pdfIn PDF document text
    • http://autobaff.xyz/xemavakovutunagenotoju4qg33.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/1801494.pdfIn PDF document text
    • https://torudedo.weebly.com/uploads/1/3/4/3/134352944/botalet.pdfIn PDF document text
    • https://ruzudagozigiwis.weebly.com/uploads/1/3/5/3/135394236/popolixekexubowoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_60500f0959fe6.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/digital_electronics_gate_questions_answers.pdfIn PDF document text
    • https://xokizaneg.weebly.com/uploads/1/3/4/8/134886830/3830551.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5fef09f8b8e55.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/pejuwazemupibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/zuvabim.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_off00011b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8C 5176 bytes
SHA-256: 76a19c678cd24892044c6fd345ea56cf2f71c9fd17e863bf2a5388131ca6b03d
font_01_sfnt_off00012d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D29 10684 bytes
SHA-256: 104fc4309c7c49a2bde07e8461dd651109fe48cdfb9425353f869c6af625acce