Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b326134e78b0b1…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 18:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6668c96a1ea209a6ac73225b56ba6428 SHA-1: 319df6c801ca04598e08e8746ae6011c389912ff SHA-256: f8b326134e78b0b1ab347ac0a2e409185a26b826969743922cbb0afe77763b47
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=midnight+club+3+dub+edition+ppsspp+android PDF link annotation
    • https://ceral.pl/ceral/pliki/file/84083538667.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/38fe7f7285c796d41a69d36a69d535c2/darifozoz.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/29752077108.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdfbbe54e2---vudidodebamizetupe.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/62909265630.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/47777172979.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf86cb79910---tozukupoxixizuxugeku.pdfIn PDF document text
    • http://land89.com/ckupload/files/46431717707.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8c721ae24667b6855b491d0a7de8da72/49341742237.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cce711c6cce---sidax.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/dvgbao5h204v9rfm3qabmv4ccr/54201123258.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160949e7e652bb---kolosapagilexerogopujedi.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/rezijipikupisadew.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/39015464998.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61b6c4e5a---48061114426.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03e65d1857---mibirufudiwuninoxez.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c066f650c0053f8426ad7a110662ff63/xuvenetanipubigi.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b49f16b6---ropoliwafujepipekod.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160917e49e9db9---40352485784.pdfPDF link annotation
    • http://cabinet-blin.fr/ressource/site-image/files/68979499698.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/47039114525.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 18088 bytes
SHA-256: 12f46343f84e86eece862f7f65348e4db6d945dc510228b6e64606135fcba09f
font_01_sfnt_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 19620 bytes
SHA-256: 46aeef37e5f931a3f638209a7829d94d85733d1a968005725c0d5ad342c55db2
font_02_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D41 11200 bytes
SHA-256: b6a0cd0ee420308aaa5fc8a1c8a5d64fe4f73e560bda1e842c35a65e49f711ce