Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 a4bd33290a32bfc4…

MALICIOUS

PDF / .VIR

74.3 KB Created: 2024-04-02 15:13:55 Authoring application: Mobipocket Creator First seen: 2024-07-13
MD5: cd02859ce6873ab2acff65c7c971c046 SHA-1: d04b7ce1f4ede741ca0a11388df129daf4f0cd69 SHA-256: a4bd33290a32bfc4895d6cddccb051694d9f65ef459efeebc98b829b7bac3d2f
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7470

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://www.fisherly.com/redirect?type=facebook&ref=listing_detail&url=https://gingiespagiftcards.com/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://rejikagabomifi.manabi-subete.com/f/97323109 In PDF document text
    • https://gomag.com/?id=87&aid=22&cid=31&move_to=https://5.imimg.com/data5/SELLER/Doc/2024/5/415139053/RQ/QH/RO/221167188/81884228956.pdfIn PDF document text
    • https://ledavl.ru/bitrix/redirect.php?event1=&event2=&event3=&goto=https://paine.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://vulitob.sentineltr.com/f/48444562In PDF document text
    • https://sofutetur.oalroax.com/49551051839750050569795569?wusopozofewosafajojowuwuvutamugenorabivemojolukevafufererataxukigeredufomidinixozusin=nefegobuvegumevojuleregivomagekatajovimonufunubugugolugavidakugifetejizoxuvodojiwanusoxawejutuvufukowasegosinanipomogetuvasokedetozumatutajebobunidopanufoworujibikinokejemapafudaripevepanuritudifaxuxu&keyword=valerian+and+the+city+of+a+thousand+planets+edits&lutugevesefutoputuxoditorosofijurixinirivemitilovedusixejekepaxiwubapexajesi=fajamaxuferimazabizizimababavijibutolevovasibadomizilekodujedajefijibanajejutixogodajuborevefoxopedelivezojuregutaweIn PDF document text
    • https://sofutetur.oalroax.com/49551051839750050569795569?wusopozofewosafajojowuwuvutamugenorabivemojolukevafufererataxukigeredufomidinixozusin=nefegobuvegumevojuleregivomagekatajovimonufunubugugolugavidakugifetejizoxuvodojiwanusoxawejutuvufukowasegosinanipomogetuvasokedetozumatutajebobunidopanufoworPDF link annotation
    • https://sofutetur.oalroax.com/49551051839750050569795569?wusopozofewosafajojowuwuvutamugenorabivemojolukevafufererataxukigeredufomidinixozusin=nefegobuvegumevojuleregivomagekatajovimonufunubugugolugavidakugifetejizoxuvodojiwanusoxawejutuvufukowasegosinanipomogetuvasokedetozumatutajebobunidopanufoworujibikinokejemapafudaripevepanuritudifaxuxu&keyword=valerian+and+the+city+of+a+thousand+planets+edits&lutugevesefutoputuxoditorosofijurixinirivemitilovedusixejekepaxiwubapexajesi=fajamaxuferimazabizizPDF link annotation
    • 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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000d9e4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d9e4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 11680 bytes
SHA-256: e7a67e20f36b9e5dfdb58a5d98d9532384d3e56d54ec8c4de38434e63c1d83cd
font_01_sfnt_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 15808 bytes
SHA-256: 8d9dab043f88a9d87d180d9cb488cf0d7eaa6ead0b9ab1c0625fce8fca9812a5