Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a04585b5b2d6d8…

MALICIOUS

PDF

71.1 KB Created: 2021-04-07 06:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca16f719a8b66d2e6184730896c62af2 SHA-1: 725941bb334d9ec25c9d90bbd8d3341e94876abd SHA-256: 87a04585b5b2d6d85d3a9f6a9679aa099efd29950ea7e62fac647145024d90db
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to educational content. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=cmp3+grade+7+shapes+and+designs PDF link annotation
    • http://vepenuvix.mygamesonline.org/memopinowofuwasijo.pdfIn PDF document text
    • http://lotofotu.iblogger.org/22887851050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fed019cc463b.pdfIn PDF document text
    • http://zitosuganenat.medianewsonline.com/dutuwe.pdfIn PDF document text
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/c9fa5e.pdfIn PDF document text
    • https://simazilojimi.weebly.com/uploads/1/3/5/3/135345327/1603449.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/cylinder_boring_machine.pdfIn PDF document text
    • http://gezetola.scienceontheweb.net/ascites_in_cats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489035/normal_601a2e8bc73a7.pdfIn PDF document text
    • https://dawanuma.weebly.com/uploads/1/3/4/3/134305997/nebesupez.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/sub_zero_fridge_review_australia.pdfIn PDF document text
    • http://kakajuzikokimi.iblogger.org/7426439379.pdfIn PDF document text
    • http://bukanugizini.mygamesonline.org/61441787244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosawakudik.myartsonline.com/biochemical_tests_for_bacteria.pdfIn PDF document text
    • http://resodexapok.rf.gd/zubepisal.pdfIn PDF document text
    • http://funakadoni.rf.gd/broadening_teaching_perspective_teacher_exchange_program.pdfIn PDF document text
    • http://pazoluno.epizy.com/55359331526.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/89027474764.pdfIn PDF document text
    • http://jixolekajes.rf.gd/jujozasuzeguz.pdfIn PDF document text
    • http://nokenamepewu.epizy.com/hands_on_machine_learning_with_scikit-learn_and_tensorflow_github_code.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49E 6544 bytes
SHA-256: da8e1be53e6d76242f05a0537960d7f2bb096b8ffee7b4e50c549aaf4b3e29ea
font_01_sfnt_off0000d4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D0 5488 bytes
SHA-256: e6443d773671de336cd2aa4918704951c036c3b133b8036c53a70aa1272083af
font_02_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 11108 bytes
SHA-256: d55b99f528e1dd8e8922f5e5c5cb084ca71076134a2c891f99a6176dcfc88ae3

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