Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43f0134f5516037…

MALICIOUS

PDF

76.4 KB Created: 2021-04-08 15:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b3cf83fc971f0b638a695bcae03abce SHA-1: 9c00fea56b6feea47fd106ce44f1f8343c35b39a SHA-256: c43f0134f5516037bd0d78d2afccb188135700ee297afe87d2575f27b816b2ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://crophysi.ru/strik?utm_term=what+kind+of+oil+goes+in+a+husqvarna+push+mower PDF link annotation
    • http://faceskinagainbeauty.xyz/167520088962q31p.pdfIn PDF document text
    • http://oneplusonemain.xyz/kaxepipojarivugimi1j0ux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5fffc78781feb.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/tratamento_asma_pediatria.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_6055bd533b5c0.pdfIn PDF document text
    • http://wixujikubipom.mygamesonline.org/tativenutusapakil.pdfIn PDF document text
    • http://fetoxuk.mywebcommunity.org/anorexia_consecuencias.pdfIn PDF document text
    • http://reassurez-moi-fr.info/how_to_write_a_short_bio_about_yourself_for_a_new_joby9j4u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff0b7aea63f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_6001cc48b17dc.pdfIn PDF document text
    • http://ru-1.casa/momupafezmg8h8.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/saxefi/how_do_you_use_a_digital_probe_meat_thermometer.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/kuxokubifuruzexel.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/fisher_price_animal_activity_jumperoo_how_to_adjust_height.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/20021259181.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/wusomema.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/57974991314.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_b94c0167f8ec42d6b8a9c9894388d7a3.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_fb4927bf5b964977abd10a6ce6855adb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/56166868858.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_7abcbd5cc51c42f8851e0613607c1395.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_a40820bbcf5848ac85c4b0735febbeaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/22366046946.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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 5812 bytes
SHA-256: 18a7566c86cf6578b2c3ad16b168534a31dbed4e88aff83054b77de283ffc299
font_01_sfnt_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 11364 bytes
SHA-256: 2503b178a8a4427c79a13ad1a7fe50371b46360efea077651a09b34dcc1cfe78

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