Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6295ba7a085ba2…

MALICIOUS

PDF

84.7 KB Created: 2021-09-19 11:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69f3144318002d81efc40f2dc5b0eefb SHA-1: b63c80ff4429a86b93e4e342eef0281f89fa8774 SHA-256: ae6295ba7a085ba237f40f51bbc9dac944a29ba7d7593115d51fad2bb770a024
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://pistant.ru/uplcv?utm_term=tiki+video+apk PDF link annotation
    • https://mimpishio2.com/contents/files/5029718747.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/46624847214.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/misekinidojuwodexotenozaf.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/vumexaduwaxix.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/vazaxovifukajuboxam.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/gowelebesilivedexuxi.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/lesafisatiletewalar.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/wixozudajujawanezag.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210902025821.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b114c5fb2---69990145827.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/jujedomuju.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/33680581097.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/71406470047.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/revepokimotikegigisu.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4a2f6abe4f03e39f4b646f536c85656e/94687168815.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b31159ea1bad1736ad43e1e47bce9786/kozozu.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/16882209316.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/jonimupivedix.pdfIn PDF document text
    • https://carpenterstouchnj.supremeroi.com/FCKeditor/file/jibukemibujifudiroxosasu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1588c4e37dec06d1c28e33c1f0837458/52116970812.pdfIn PDF document text
    • http://salt17.com/userfiles/files/kininitid.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/basipibofezexovimipug.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/25993267791.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://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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 19924 bytes
SHA-256: 3198d8c3706f4fec7bad80cf1336466ca9495ba7c9bd4acc9ae45fd023099120
font_01_sfnt_off000116db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DB 9988 bytes
SHA-256: 803bc5e59715eda22c8bee2ee4101054eba1cbc2a9d4ad45b6ec0e16a2de997d
font_02_sfnt_off00012d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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