Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae10a0ccf5ae2a3…

MALICIOUS

PDF

85.8 KB Created: 2021-03-14 05:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 34e653a3bfd6500f4b738aabecd0c6d8 SHA-1: 3419d47a904ac1356c4f5a06e8698db8275d2b1a SHA-256: bae10a0ccf5ae2a351efacbb321aeceaaa0c3a0406b88209d561fee5c749bcc2
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high concentration pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate the document's primary purpose is to redirect users to potentially harmful websites.

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://soxebez.ru/wix?keyword=determination+of+the+empirical+formula+of+copper+oxide+lab+answers PDF link annotation
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/0e39c07ef8.pdfIn PDF document text
    • https://kabezanaxojuzer.weebly.com/uploads/1/3/4/2/134234652/d70000.pdfIn PDF document text
    • https://kubududowu.weebly.com/uploads/1/3/5/3/135349078/1718777.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/33098073130.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/vubufef.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/supavogixupagigo.pdfIn PDF document text
    • http://xatarekinusafo.iblogger.org/tanazajanemedebefav.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://s3.amazonaws.com/vidadaviwal/anemia_falciforme_artigo_de_revisao.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/animation_software_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/casio_wk-110_used.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/jarojimogalejixatorusute.pdfIn PDF document text
    • http://gusutawidike.epizy.com/how_to_add_zotero_to_word_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/how_to_read_chinese_gender_chart.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_f306c8d8608b4fd39d20916f5c94a7dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/46992900384.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_5e7b238dad414e50b12f8b925596d711.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/mh_cet_law_online_form_2019.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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 5576 bytes
SHA-256: 7bbfa49983387e4828af087aabf49ad9bb2686cacf3b6a24a8a9f830995c1dd9
font_01_sfnt_off00010228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10228 10472 bytes
SHA-256: caf98ff27340f047f52e8fdd04d718f18c5b0cded910f30b08d8e7037d2e7a97
font_02_sfnt_off00012660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12660 16100 bytes
SHA-256: d526eb2c39b9930b2b2be74d5a2f8686c015d9e64f4483e5fbef24255431b171
font_03_sfnt_off00013b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B29 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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