Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8d5de4a57b3f87…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 03:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a15700c8612ec70edb49e23fe37db0c5 SHA-1: 4e6fc2d221c5a6784a1b8a0a923d23adecee981d SHA-256: ba8d5de4a57b3f87da73e0fd673873da797ca36328bad5c2a77de814c0fca556
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-confidence ML detection and a ClamAV signature indicating it is a phishing or malicious document. The embedded URL and document body lure users to download cracked software, specifically 'foxit reader phantom full crack', via a redirector. This indicates a phishing attack aiming to deliver malware or trick users into installing unwanted software.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/strik?utm_term=download+foxit+reader+phantom+full+crack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464852/normal_604f7af9b315b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_60268c8344861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_602961a3d639a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwepikos.rf.gd/rerisari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1179de-c56e-4cf3-ad95-0eeb221284fd/winning_the_losers_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f74b402-6722-4b29-94b4-57eed9bf1bd2/what_is_principles_of_web_design.pdfIn PDF document text
    • http://vularamefak.epizy.com/bangla_golper_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/73773442152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5198863-9753-4f4e-b6c1-3452c048691e/best_oil_for_jeep_3.8.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/lightroom_presets_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/when_will_the_stock_exchange_close_today.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/43865538740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fa809e-9c90-4676-a6e3-9c55addaca0a/mutage.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/pedukaweze.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/zoetropic_pro_apk_free_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ee6576-4603-4262-9a4a-ce7da3aaffad/how_do_i_use_garmin_delta_xc.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/to_formally_give_up_one_word_substitution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4cd036-142b-4212-a216-52e9224c162f/60334381230.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_off0000ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1C 5440 bytes
SHA-256: 7cf021465aa958c1123d1021c1e58431f69677818f6205309bb477e58f9fa806
font_01_sfnt_off00010095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 10920 bytes
SHA-256: a51a3d298639d7225cbe53020b4772a3817a8982e02ecc1424670eaa9c34a600

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