Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c568591f9c5991…

MALICIOUS

PDF

80.5 KB Created: 2021-03-20 00:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af95a0654fa5ab02a74fc1bbfb68b795 SHA-1: 1acab810800974150d1bc736290078885b837972 SHA-256: 00c568591f9c5991d60246a64793423840b49df84a7425f1d12ce77d9d217231
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 0.9998

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://druttle.ru/123?utm_term=assertiveness+skills+worksheets PDF link annotation
    • http://nibajafij.medianewsonline.com/modo_de_produccion_capitalista_y_socialista_diferencias.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/91667180012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedikoti.epizy.com/cmaa_risk_management_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647eef7b-0645-4b7a-97f6-86809b35ac43/36768684908.pdfIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_bade5081ea3a4f75a48854bd3b133e55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jobavo/aahista_aahista_song_free.pdfIn PDF document text
    • http://tugosujamas.rf.gd/insinkerator_garbage_disposal_with_cord_badger_5_1_2_hp_continuous_feed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8c965b-cf0a-453b-8f26-9b2c76169408/how_do_i_get_my_samsung_refrigerator_out_of_demo_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/86495109012.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/credit_limit_worksheet_schedule_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8fcd383-5339-475b-aed3-5e62a18f444b/siranulafow.pdfIn PDF document text
    • http://vaguxupinirulop.epizy.com/business_development_courses.pdfIn PDF document text
    • http://zubeleboju.epizy.com/chehalis_river_fishing_reports.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/60367472799.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/51482364120.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_a3ca842556db4693b3dcdae09fac6784.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 4768 bytes
SHA-256: 69460fc2f8a384a2359bdfbeb6d2d720d1ad6722246457f3533f7794b8d6699a
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 10628 bytes
SHA-256: 44a3a2997ca4c70adb787bd8700235f2e5e01ffbefd650283d2f0dc1660d65fc
font_02_sfnt_off00012043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12043 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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