Malicious PDF — malware analysis report

Static analysis result for SHA-256 9147682caa52ffda…

MALICIOUS

PDF

69.7 KB Created: 2021-03-16 05:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e330a6646d190bcbc52793e6fb9f28 SHA-1: eefa27a6ae75b3f689e0a5cb55c0ddf3a0361b36 SHA-256: 9147682caa52ffda93ddf4a40783df929f4933f45402b41d5560446858a93be6
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing lure. The embedded URLs point to various domains, some of which are unknown or potentially malicious, further supporting the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=manual+bienestar+animal+pdf
    • http://idealica-italiaoficial.site/85277528844vdd09.pdf
    • http://shopwithsale.website/modal_argon8_manualkk0fj.pdf
    • http://dufifudusimube.mygamesonline.org/daveraralevakititi.pdf
    • http://fazejajogavu.medianewsonline.com/9873629802.pdf
    • https://kuwuxegizeduki.weebly.com/uploads/1/3/2/6/132695805/1800843.pdf
    • http://kikababono.mywebcommunity.org/tixexavovakobozewiwopuge.pdf
    • https://natufebopod.weebly.com/uploads/1/3/4/3/134305275/mafozid.pdf
    • http://fuvagezilavez.mygamesonline.org/barbarians_inside_the_gates.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_47cbaebf1d8e4357951dfa16e50dd396.pdf?index=true
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_9dc8fa7652e746379c929d69f376917b.pdf?index=true
    • https://s3.amazonaws.com/lukepepe/vepopevorenowuk.pdf
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_dca7864fffe04ff698e97262f9d8df96.pdf?index=true
    • http://koriwironawuva.myartsonline.com/basic_japanese_language_learning.pdf
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_f7e2f24e1dc7448e8ad9b4be7f743e5e.pdf?index=true
    • https://s3.amazonaws.com/gonasidupij/31345048306.pdf
    • https://s3.amazonaws.com/xeroguru/3d_football_games_for_android_mobile.pdf
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_6b3c071c85c0493a859ae66a164c6dca.pdf?index=true
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_07c8ebc0d7b343e1a105398d221a7a65.pdf?index=true
    • https://s3.amazonaws.com/bezegoluzose/magic_chef_dual_zone_wine_cooler_parts.pdf
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_1d713ce7128c4565897b34f4189485fb.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d206.bin
f1df290b19fa5c425d316bc023d37836366d88f3b68451773f1cc724f35d5c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD206 5332 bytes
font_01_sfnt_off0000e415.bin
0118b7b504827627134c281abd8f125ea2f3942612de757806dd3e492fcdba80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 10900 bytes

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