Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f49270fbe7013ee…

MALICIOUS

PDF

79.4 KB Created: 2021-02-26 09:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 13a92cdb6f00a93a37d572ff54a18f1e SHA-1: 6674d9c91af87c4b761be858ce5b634df5e85341 SHA-256: 3f49270fbe7013ee5ee82e36ca619fbfbf6175941d30b03a1b620d06fe498536
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/award?keyword=bostitch+f28ww+rebuild+kit PDF link annotation
    • http://kikababono.mywebcommunity.org/tixexavovakobozewiwopuge.pdfIn PDF document text
    • http://retelikilerodad.iblogger.org/benutajokozexagiba.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/genie_intellicode_chain_glide_gcg350l_manual.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/9198196.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/sBJMhax/62942737592.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/cjjjazl/my_little_pony_pocket_ponies_mod_apk.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/diccionario_derecho_romano_gratis.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/ion_profile_usb_turntable_software.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/308247e.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/7890ffe.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/davabo.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/images_of_organisation_gareth_morgan_free_ebook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/35960624084.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/free_dreamweaver_website_templates_cs6.pdfIn PDF document text
    • http://zifasodokid.epizy.com/traxxas_t_maxx_2.5_roll_cage.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/rapibovowoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/relationship_between_reliability_and_validity.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/dakonugizalava.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/springboard_mathematics_course_3_book.pdfIn PDF document text
    • http://daxararudivoxik.rf.gd/introduce_yourself_answer_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/fuxebogotasitaduni.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_off0000f373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF373 5572 bytes
SHA-256: ae7ec135ed17f9532d76b1caf929929401a562b5b1a1b49fde697cd7523a2404
font_01_sfnt_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 13096 bytes
SHA-256: 6d0159f0acd358bbfbe3cea837eaf5d0db1afd1cb72917471bb80c41cb4f9c1b

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