Malicious PDF — malware analysis report

Static analysis result for SHA-256 785854464297bd51…

MALICIOUS

PDF

220.3 KB Created: 2021-04-01 17:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 699dfa125c1185bb182994d76d378dde SHA-1: b63ab491756a958c3ad285b7b17bf18f7aee8307 SHA-256: 785854464297bd51ce5c41664f4b130f77f5758b81b23d9a690520318012c5bc
136 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, specifically identified as a phishing trojan. It contains an embedded URL that acts as an SEO redirector, luring users with a 'free download' theme. This suggests the primary goal is to direct users to a malicious site for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jottigo.ru/wix?keyword=god+laughs+when+we+make+plans+scripture PDF link annotation
    • https://cdn.sqhk.co/xubupigegi/ghfhb8S/word_search_puzzles_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/cNheibS/war_ants_io.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5feb958ddd89b.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/kjdjd5Q/47831335705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_6035aba941a1c.pdfIn PDF document text
    • http://sberbank.link/firefox_app_free_for_laptop1u8bb.pdfIn PDF document text
    • http://scarcebook.com/911889273265g5ev.pdfIn PDF document text
    • http://wubosilafusim.iblogger.org/kindle_ebook_format_extension.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/ninjago_dragon_lego_set3w3z1.pdfIn PDF document text
    • http://lofitner.buzz/android_studio_change_icon_name02k9j.pdfIn PDF document text
    • http://instacopyrightcenter.com/71860199448qky7q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaxilofekuji.epizy.com/24651832824.pdfIn PDF document text
    • http://wupewovixiroz.rf.gd/balance_sheet_assets_items.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18841566-8e6b-4a13-ba75-b9ae8817064b/pomafudo.pdfIn PDF document text
    • http://najepesirezamuz.rf.gd/definition_of_accounting_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00cf3406-823f-4326-84bb-6d65a68b2f3d/ab_lounge_sport_directions.pdfIn PDF document text
    • http://wutivufugisev.epizy.com/cctv_camera_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508db3b3-5c70-4d81-9878-04e7b16c0e63/guxuzokenuvetubes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98712a31-0f7d-465f-849a-86f48bdf6797/fupejesafoxekitosulaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9faa736-d3c8-4340-998f-aee3555a9117/chrono_trigger_remake_2020.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F30A 5676 bytes
SHA-256: 9c91f24429edbe90621d96ed8bf4c2a8fa41abf81c55e1f5852ad41800f0e90b
font_01_sfnt_off0003063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3063F 27356 bytes
SHA-256: 87d4924bd8c40d81b26f3898e383e7b1d7d6bb8644e2b1a8641e2c6ab1394aea
font_02_sfnt_off00034ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34EA3 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15