Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86f2ddfbee0db3b…

MALICIOUS

PDF

81.2 KB Created: 2021-02-24 03:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e8459254d3a681645518fa5f7346626 SHA-1: f0a73010b68fce49f3ba833260345f436ca0722f SHA-256: d86f2ddfbee0db3b2ed90415b58e97a8e2d6ff9b648bc2c84ee401df9aa10008
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to benign-looking PDFs, but also includes a suspicious URL (https://baarspo.ru/123?utm_term=global+x+cloud+computing+etf+stock). This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

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 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://baarspo.ru/123?utm_term=global+x+cloud+computing+etf+stock PDF link annotation
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/ronuvomuwumega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_60226e53da7b4.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/9cfdf.pdfIn PDF document text
    • https://manobafezelibo.weebly.com/uploads/1/3/1/6/131636879/5015187.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/juxazu.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/890e503172.pdfIn PDF document text
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/dosuduwal-xuwodovof.pdfIn PDF document text
    • http://hrushch.space/cuisinart_dlc_10_plus_food_processor_replacement_partsd59uz.pdfIn PDF document text
    • http://kemytbok.xyz/concepts_of_object-oriented_programming_with_visual_basicrg250.pdfIn PDF document text
    • http://gobigs.space/vetimuxegejodilimenuvtivt.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/796f5.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/zupafatatar-wenesavugumegem.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/gfhiijK/67417218274.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/6447214.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/satudifin/ur_phonics_worksheet_sparklebox.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/27664529010.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/carpool_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/applied_econometrics_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/gainful_employment_reporting_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D9 5684 bytes
SHA-256: 498002eed1aca21a1418ea5e0dd3cef552a63488a56fa45aaf0103016fb0983c
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 12348 bytes
SHA-256: 4fe0ab6a8cb302da8aaa6077132afa177d314ebb09fe56fc5fee86ae06510f0c
font_02_sfnt_off000122df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DF 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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