Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a10eac5006bd64…

MALICIOUS

PDF

77.2 KB Created: 2021-04-14 14:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cb3ef8418b370738ca5e515147db85b1 SHA-1: 5ada2c5d9202b4d825e93d6ce336d1ccdf89a6af SHA-256: 34a10eac5006bd64d44a56bf94fca89d22b888d9b5ff934237e2d71e0e2c76b8
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://maypoin.ru/strik?utm_term=why+does+my+firex+smoke+alarm+keep+going+off PDF link annotation
    • http://watogoda.mypressonline.com/80835863914.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/58294123212.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/hcEDBjf/plague_inc_evolved_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/OGXcvie/carnatic_vocal_music_classes_in_adyar.pdfIn PDF document text
    • https://cdn.sqhk.co/visipapafef/jevPjeD/46533196917.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/Zhcephi/xbox_series_x_in_stock_tracker.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/xafaxotaful/3d_wallpaper_photo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/58117295086.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/bump_of_chicken_ray_album.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_1c160ab7555e4daa8c521b63f53de070.pdf?index=trueIn PDF document text
    • http://danifofaluga.epizy.com/wordly_wise_3000_book_8_answer_key_lesson_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92945c05-94ee-4bbe-b95d-3d788ae3f3c7/wordpress_tutorial_video_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/folewinitovesigugovunera.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_40cb9be2f63c4c5a852481ae99479a1a.pdf?index=trueIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_203e3b3c8b8548ac8af3efc5c9860648.pdf?index=trueIn PDF document text
    • http://tozibuxadotoba.epizy.com/nifewitujisuvomugadunot.pdfIn PDF document text
    • http://tojugejuxutusur.epizy.com/52437208567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3eaeb0-b66b-4755-b812-00a902080242/45433438589.pdfIn PDF document text
    • http://wokobudedisete.rf.gd/34979183350.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_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5700 bytes
SHA-256: 42047497525c1b0af97a76cfbf2cd0c5530a094022345f412604dd37b347a1d5
font_01_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 11184 bytes
SHA-256: 12e7443853eb1526d83152d35c46b0d479a35601afafe2d3ce3163b348f2193f

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