Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6430c522a09939…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 01:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b36d1a2e256f902403aab2ab16c1250a SHA-1: 287e31f7dd3cff95af4952bc55249b444f72df71 SHA-256: 4d6430c522a099394e6e116f8e6c336ad779aa205e0836af9362337ebe8d6599
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://druttle.ru/wix?keyword=magnetic+drive+guide+set PDF link annotation
    • http://allrecipes.pro/likotumaso2qk35.pdfIn PDF document text
    • http://spainwow.pro/blender_video_editing_tutorial_in_hindi7bthh.pdfIn PDF document text
    • http://sadovik.me/77175719276flomy.pdfIn PDF document text
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/kixem_ruxoxotawemu_zifin_todule.pdfIn PDF document text
    • http://all-system7.xyz/37069057119qq8gf.pdfIn PDF document text
    • https://ripapexogona.weebly.com/uploads/1/3/0/8/130874469/1284573.pdfIn PDF document text
    • https://xefapakofaguwa.weebly.com/uploads/1/3/1/1/131164324/lukorezonijifebezaz.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/faranakebasiguf-wigusep-xaguwatubokusuk.pdfIn PDF document text
    • http://bluebadgeform.com/rafuwopirenuwejop0r4f.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/8108590.pdfIn PDF document text
    • http://salimom.mygamesonline.org/19435549053.pdfIn PDF document text
    • http://zikevamakag.mygamesonline.org/all_formulas_of_maths_class_10_ncert.pdfIn PDF document text
    • http://gafujovinotu.22web.org/mativovemogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufabufitilaf.epizy.com/82257372181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe71f39d-1ea9-46f8-8f95-6b536096fe2e/92133345275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07aa42a8-dca9-472c-a7d6-eaf9e2210072/23312674305.pdfIn PDF document text
    • http://sokurunofizune.rf.gd/vujebodulaxasi.pdfIn PDF document text
    • http://mujubelajuzuj.rf.gd/69326958809.pdfIn PDF document text
    • http://wuluzakasuw.epizy.com/20309622735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf284551-2be9-4d52-96ff-289d80c6f23f/what_lawn_mowers_are_made_in_the_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79c3f15-b411-420e-a741-ecc1e18b46c3/tipos_de_librerias_y_sus_funciones_en_c.pdfIn PDF document text
    • http://jatojitax.rf.gd/nikukofudu.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_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 5140 bytes
SHA-256: 78e33b75176cad0ab05747041e539e4d359249db573f674763c7768725896e03
font_01_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 10168 bytes
SHA-256: a62e7729882eaf16ede4a3dd5b8b5a7fdd8adee79edd07d0ce26322f16ae180c

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