Malicious PDF — malware analysis report

Static analysis result for SHA-256 242728b84f9b58ca…

MALICIOUS

PDF

78.3 KB Created: 2021-04-29 12:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 588e7296a329f71888ea998a177d17c0 SHA-1: db9fa3cf243cffed0b5a302a0d6f642234fa388f SHA-256: 242728b84f9b58caa2b7f1a8cd64b229f294ceb8a13ef74d323f5d17a0c9f5c0
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The presence of a download button heuristic further supports the intent to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/strik?utm_term=jesse+tree+ornaments+jesus+storybook+bible PDF link annotation
    • http://uspeh.icu/7807542842d28k8.pdfIn PDF document text
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/528216b77c4e2b.pdfIn PDF document text
    • https://jatisarekitikez.weebly.com/uploads/1/3/4/6/134661612/muxenuja-majexorezen-fukatanifot.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/winojogaza-futurusonedele.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/23480545911ltbdw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481056/normal_5fe7c2ca17bc0.pdfIn PDF document text
    • http://opencabinets.xyz/what_is_scarce_resources_meany15ca.pdfIn PDF document text
    • http://rm-swis-mine.com/redijifjj319.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/lamowemubazurux.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/eghhgii/fumiv.pdfIn PDF document text
    • https://danisamotaroz.weebly.com/uploads/1/3/1/6/131606121/f56520ffd5cfbe.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/5JghhhF/apakah_game_cooking_fever_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470016/normal_603c843eb81db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_603ead1e564d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_600c04340457c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_6004cc76a8136.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/9l8tFih/91100004611.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/rabewiruzitewa/consumer_math_unit_3_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/natural_language_factoid_question_answering.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/95795490152.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_off0000f21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 5200 bytes
SHA-256: 11e17f74a7e102fb0c33a742da9173058c1737867b86a6c7603074c0e1fe89ac
font_01_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 11152 bytes
SHA-256: 118909cbc0015679291b9f3e9631f0ef63665526be136f68df340a86e1cff484

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