Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc869acfba4fea1f…

MALICIOUS

PDF

143.2 KB Created: 2021-03-11 17:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b0e002d1b90617f15199f48a2aef447b SHA-1: 51312e79da8ea7213d6979fa4f5c41aca0a0f203 SHA-256: cc869acfba4fea1f4cfdcc61e4e94846b2c091211e5776dd7182d4b15d162f04
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://jumiwimov.ru/award?keyword=khalid+bin+waleed+urdu+pdf PDF link annotation
    • http://esportzmlevent.com/first_grade_math_problem_of_the_dayq3zs2.pdfIn PDF document text
    • http://biolinkus.me/24764224084rpyah.pdfIn PDF document text
    • http://eslivdrug.space/pinugomexesokmx6a.pdfIn PDF document text
    • https://cdn.sqhk.co/xizemeginu/O3gcZic/numivi.pdfIn PDF document text
    • http://qunit.space/zalapesiv7t8io.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/TuvdPig/galaxy_parallax_live_wallpaper_premium_apk.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/bisapovepizaj/class_list_templates_for_teachers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/telomavazezonefagagozalil.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/rowoxosuzadigovitomo.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/fuzamotafejumom.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/how_to_connect_krk_rokit_5_to_mixer.pdfIn PDF document text
    • http://domuromu.atwebpages.com/44300980458.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_179810dca5fa4d8da4abe40830e59d99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovugi/kocc_et_le_civisme.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_b9ea82f877314a1a878d4db5ac2a4eda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/figuxezofajupegul.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/39686954764.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/how_much_does_a_9.9_mercury_outboard_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/48193032297.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_off0001cfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFD2 5152 bytes
SHA-256: a0ee8a783416837c694950645a64581050a6b0c344e472da6f5edd16f4ee0bb3
font_01_sfnt_off0001e163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E163 15996 bytes
SHA-256: 26090f14b1eb2625747e65ca1d59773152b72ab15b5f86ef61cffb9ac48867f0
font_02_sfnt_off000211bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211BF 18132 bytes
SHA-256: fdc8ff028bd3988413cc62081a3b5cc5717469c71d76c5af3ce8a8242a416cec

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