Malicious PDF — malware analysis report

Static analysis result for SHA-256 081cf866d315ae46…

MALICIOUS

PDF

78.9 KB Created: 2021-03-31 08:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06ef9664f9720dc49848f08524c22d40 SHA-1: 7446b7e86966737645501bcea2073b73a25df3b4 SHA-256: 081cf866d315ae461a225689756042a95af4eb728042c2bacd14fb00711f1393
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, often employing JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=mount+and+blade+warband+leveling+guide PDF link annotation
    • https://cdn.sqhk.co/wumidimux/vTggghd/83420358393.pdfIn PDF document text
    • https://cdn.sqhk.co/jomurozop/hfIjc8B/angular_material_form_example_with_submit.pdfIn PDF document text
    • http://vojamugoju.22web.org/65516795262.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/jfthjhb/wuraxev.pdfIn PDF document text
    • http://usmileofficial.site/museputeduopayp.pdfIn PDF document text
    • http://cmb-accueil.com/romeo_julieta_cigars_mini7zhsu.pdfIn PDF document text
    • https://jitaginedisa.weebly.com/uploads/1/3/4/3/134324559/lediputogosi.pdfIn PDF document text
    • http://usesoda.pro/linajidukunepatanukhpnth.pdfIn PDF document text
    • http://raisinshq.club/kuzubumopalazipzt08d.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/zifiaja/dizakamatowozeno.pdfIn PDF document text
    • http://boothattendant.com/butter_icing_cake_designs_for_birthdaycep7z.pdfIn PDF document text
    • http://maturibcgj.space/citadel_change_machinevdxi2.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/sufivadele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowuzubu.rf.gd/jotetukolede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5421814-8aed-4b84-bb3f-9e5595c9c6ee/22493953791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c5ac2b-23f5-4362-b72d-cbeba3f63d49/pozesagop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e01b5be-65f2-4367-933c-186b09284d5c/petsafe_dog_shock_collar_instructions.pdfIn PDF document text
    • http://zipavisaxa.epizy.com/beowulf_a_new_verse_translation_seamus_heaney.pdfIn PDF document text
    • http://zusapogadakafa.rf.gd/cartoon_character_development.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_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 5112 bytes
SHA-256: a3580fb8a2057df02274bd9c52aa0bedd86945907a7903665da8f3d096c95132
font_01_sfnt_off000107ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 11624 bytes
SHA-256: 0dc4126f2432a5762ac21b22505e9d2afea231de1cada90018a14978488353e6

Open this report in the interactive analyzer, or submit your own file for analysis.