Malicious PDF — malware analysis report

Static analysis result for SHA-256 9784dd98d7f4dabf…

MALICIOUS

PDF

70.5 KB Created: 2021-03-11 09:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 229544d52c6d8e6c199d2b1f27b6b250 SHA-1: 17328a3bf8821ee07e96e020295900fd241954a5 SHA-256: 9784dd98d7f4dabf2d7b412f5947f16d5b3b92ceed89e4ff7d86f83876208de2
126 Risk Score

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 heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/award?keyword=assembler+des+pdf+en+ligne PDF link annotation
    • https://cdn.sqhk.co/bulunazi/libIjbx/silafutun.pdfIn PDF document text
    • http://dorisedijizido.iblogger.org/ne_me_quitte_pas_lyrics_regina_spektor_meaning.pdfIn PDF document text
    • http://jizotolifuvi.iblogger.org/what_is_the_purpose_of_cognitive_therapy.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/wapedaminar.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/imitation_dairy_products.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/GsicgiG/babylist_coupon_retailmenot.pdfIn PDF document text
    • http://terugate.mypressonline.com/jofepukado.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/fuvorugafowemujaz.pdfIn PDF document text
    • http://gubimulugepu.22web.org/chamberlain_universal_wireless_keypad_instructions.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/sarukakebimifesozina.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/if2ijjc/american_drag_racing_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cd213083-4fbf-4848-a53d-248e8fd918fc/craftsman_109_lathe_parts_diagram.pdfIn PDF document text
    • http://tuzuvas.rf.gd/kabekonezi.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/alcatraz_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4b5b50-fdea-4a4d-b608-c03ca17200d3/706790158.pdfIn PDF document text
    • http://lufuzefaz.epizy.com/30342331772.pdfIn PDF document text
    • http://xisuferixap.epizy.com/novol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077206a3-678c-46c4-865a-6c4ec316740c/jafudar.pdfIn PDF document text
    • http://retobawunabe.rf.gd/59633491921.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC896 4876 bytes
SHA-256: e0626b052d62a80c9b57e70ee561c9f045ea60666314aa6049d128797bdafd0e
font_01_sfnt_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 11084 bytes
SHA-256: e5e7b2ffa86f527fedeb506096c6349f6ca689695c4ed67e5d5f4d558e6962a0
font_02_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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