Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17d177fcd0a56ca…

MALICIOUS

PDF

79.6 KB Created: 2021-03-27 20:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 808c763df483f94623c70060f1dd136c SHA-1: d425a4bc96778509e62931e6fa2a4794155197be SHA-256: e17d177fcd0a56caf5f8de8ec79b6e182518f910c4a2b9369d2987c9127cc352
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 0.9994

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://resalured.ru/strik?utm_term=how+do+i+prepare+for+a+scholarship+interview PDF link annotation
    • https://cdn.sqhk.co/tomubozes/bQrjeij/golden_boot_soccer_academy.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/highe2y/masinarajeluravoxebew.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/RDdOmJC/14760436042.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/c0tjege/lightroom_presets_for_iphone_etsy.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/76022055678.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/vgeifgi/lemonade_diet_recipe_for_one_day.pdfIn PDF document text
    • http://tewosube.mypressonline.com/purine_and_pyrimidine_biosynthesis.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/kukupunopedon/platform_heels_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/being_independent_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/11222483325.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/63008858818.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_ce181813219943b5846a9a6dab57655a.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_25250275228f4dbd898b1797f7840f2f.pdf?index=trueIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_8e260613871b4e899f30a8ab802bf24e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/2595792238.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_30ad85301ab4471a80dbcb716c16b566.pdf?index=trueIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_0723089e63454cfb929d394003e470a3.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_85cf8a162c9d47528190087e38ae0f96.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_a6cde0c546e94521a5b1fd48a163b3b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/25639915107.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_2f4d0712bbe141cab01454a6bcf1f575.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/52412980810.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/80332993229.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_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 5356 bytes
SHA-256: e92e8b169cb8e5af5de4146f01fc30774badf9a99da49f7c735eb106238e7582
font_01_sfnt_off00010c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C16 10700 bytes
SHA-256: b21f6dd4b6681d9357fd0ccecb10c1d6edefe2085eb8642273207453ec4af98f

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