Malicious PDF — malware analysis report

Static analysis result for SHA-256 0529f0401fceaa2b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-11 04:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ce2655e60f471145a7a37dbaa83aa67c SHA-1: db1c0012f3af2b802c6f58376bc2b2875d95dc84 SHA-256: 0529f0401fceaa2be4c460320632948d997ca8c666b44c16399f3dfbce7350b4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content.

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://jumiwimov.ru/strik?utm_term=the+witcher+3+guide+reddit PDF link annotation
    • http://mebovedu.getenjoyment.net/what_is_a_dilute_dachshund.pdfIn PDF document text
    • http://hardcreditcheck.info/arris_nvg589_batteryk30u4.pdfIn PDF document text
    • http://sportita.fun/fefizafexizulovoziwiwaw6e2si.pdfIn PDF document text
    • http://parhelifrl.space/63367159403rjnmw.pdfIn PDF document text
    • http://woodlesenka.ru/saworexagadixogalz41hg.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/how_do_i_recover_my_facebook_password_without_email_and_phone_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dd70aa9d-092c-426e-a6ee-8765df4b6aae/wild_magic_tamora_pierce_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d210862f-0e61-4f5c-96e6-ecbe8dfaffca/vedasevobatitoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/17243584613.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/javascript_array_splice_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/sample_article_critique_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/obod_ovate_course_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/bu_jhansi_online_form_last_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17151e2f-4997-4df5-b531-18b76cde2304/farberware_oil_less_air_fryer_recipes.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/scotsman_ice_machine_maintenance_manual.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/gazaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79f5e3c-e54d-4594-a56d-3058483b031c/31700961380.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_f661b4163e784d16820ecd83ef25518e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b21c151a-0f6f-4ae0-abb5-ce6b305c0c15/49206799388.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_7b65f0b59f2d4ebe98ea241159f22fa3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bollywood_movies_new_full_hd_free.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_3217a104f6844ff590bf8e242204a703.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_45912ddbbbf74dc9b45353be83ae25ca.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB23 4652 bytes
SHA-256: 43fe6c0c9bf5818d901593f8f010beb0a72fd0d08ada80ae70710d0dfd97c983
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 11204 bytes
SHA-256: fd24995aa996933bc820041522b45a0957949c13b19deff582146514bfa96cb5
font_02_sfnt_off0001216a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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