Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a12ede572341cec…

MALICIOUS

PDF

94.6 KB Created: 2021-03-02 22:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ed2b804bfddc5fba48fb22a93fd676b5 SHA-1: 384d6b7f58aedd03125eca2065bdfaf8981ec437 SHA-256: 6a12ede572341cec5d8539da1cc3abb95dbe9330c3030dec4e189fd3c8a7d645
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, 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 URIs are indicative of malicious activity, likely leading to a second-stage download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=what+emojis+should+guys+use PDF link annotation
    • http://xotizel.iblogger.org/20889005470.pdfIn PDF document text
    • http://yellownatural.space/Tanec_india_tanen_sezna_3_Salmanx7ef7.pdfIn PDF document text
    • https://wejigewaja.weebly.com/uploads/1/3/5/4/135400860/9e47efbf8.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/31048377972.pdfIn PDF document text
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/jalaxadilabetewu.pdfIn PDF document text
    • http://menbp.online/dufifotamomikab65ia1.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/4bc037a38cab76.pdfIn PDF document text
    • http://maroron.22web.org/what_if_china_became_a_constitutional_monarchy.pdfIn PDF document text
    • http://slampochka.ru/74610576340d6n8x.pdfIn PDF document text
    • http://redpandarecycling.com/tugaxavu11cw3.pdfIn PDF document text
    • http://trokot-shopnew.online/pajomommoem.pdfIn PDF document text
    • https://xunimolozabipos.weebly.com/uploads/1/3/2/6/132681728/66f682.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitepipugul.epizy.com/kerboodle_summary_question_answers_chemistry_ocr.pdfIn PDF document text
    • http://xanomake.epizy.com/sunenib.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/98060252894.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 5332 bytes
SHA-256: e1b4b48aad86051276d92454ffc7740253b80d86da9c668a28a8e887fee65625
font_01_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 10492 bytes
SHA-256: 4abc48a777c1bbddd9c891535bbfb2de1f39659b17ba00937bafa2855bac9530
font_02_sfnt_off00012b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B69 10580 bytes
SHA-256: e14666a096893a585e82c6df51a2625faab0103266f9f3a957ef370971570a7b
font_03_sfnt_off00014f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9E 20432 bytes
SHA-256: 256dd1c5795c8c5d97d7de3ddba05eebe275a3a8fff3c91bcb3dfb2405f6492f

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