Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ef39cd195a44e1…

MALICIOUS

PDF

81.6 KB Created: 2021-03-28 16:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7b4aa3ab79f1bfe5c525d83ea243bdcf SHA-1: 5b06fccd5f6dc75f8423d345659111cd37c11cf5 SHA-256: f4ef39cd195a44e14ecc3e6596640d46f8152f44cf07417ace9f855b2e5c9708
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 0.9995

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://fokemale.ru/wix?keyword=b%25E1%25BA%25A3n+%25C4%2591%25E1%25BB%2593+vi%25E1%25BB%2587t+nam+b%25E1%25BA%25A3n+google+maps PDF link annotation
    • http://fdvsefwfrw.space/80438258948tegvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_6008a04950ae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_604b15a04c861.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/ijiijGb/uber_eats_local_food_delivery_app_download.pdfIn PDF document text
    • http://magatapomuv.22web.org/todubafevide.pdfIn PDF document text
    • https://cdn.sqhk.co/livixugakuf/LOijASu/29572463812.pdfIn PDF document text
    • http://hallop.xyz/aaoge_jab_tum_sajna_ringtone_freeifloc.pdfIn PDF document text
    • http://navalny.design/can_you_create_your_own_workout_on_apple_watchdlhgx.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/jihdPhg/80222666428.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/gijbjje/stack_crush_ball_real_money.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/ihjXgif/dental_hygiene_assistant_pay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376103/normal_5fee672375e49.pdfIn PDF document text
    • http://zegosuvavanow.22web.org/75246466842.pdfIn PDF document text
    • http://marketes.pro/how_to_make_jerky_in_electric_smoker4w4em.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://s3.amazonaws.com/masevewi/13564200163.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_239384b2d3604d1a86943edc5695229e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/what_gm_cars_have_the_3800_supercharged_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/48307624742.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/48226533767.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_b4de090b54f94af49ddb2dfa9340ba00.pdf?index=trueIn PDF document text
    • http://muvelexadaw.epizy.com/max_bundle_size_android.pdfIn PDF document text
    • http://jokolonu.rf.gd/32124770343.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 5836 bytes
SHA-256: 511847f171282833dc4c32c7f13b5ba0501ca1749adbc7f7facd2636216e4477
font_01_sfnt_off0000f72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 23368 bytes
SHA-256: b9c390981ae45b927e1b52be4ab7b4385314736afd2115af01bcb466c627fac4
font_02_sfnt_off0001290a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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