Malicious PDF — malware analysis report

Static analysis result for SHA-256 803b7d08c60e9af6…

MALICIOUS

PDF

113.0 KB Created: 2021-06-29 12:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45d7409c166f7c7e1de6d48c662f8121 SHA-1: fd6ec5ca376bf24512d3758adfa463c7653f659a SHA-256: 803b7d08c60e9af6ba45f5fdf1553bed48ba6fad03ec4188ceae46840cda5c5f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, with specific heuristics indicating it's an advance-fee scam lure. It contains numerous links, many pointing to compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the document structure and heuristic firings strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078729aafd62---bozapif.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/51754535194.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/9drprvgh9pi60kovnhrhhjr923/xiworid.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/bjvfbh78mep8662qsa22r3s333/6785131735.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/4f8e17irum2kl8vv6i7b39vr38/74416445061.pdf
    • http://bitite.lv/media/txt/122/file/busugizezomisipakipoku.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a672f1cc496---42911575802.pdf
    • https://aucordechasse.fr/vosImages/movixatowefemibelexule.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/8db9256e79ed64a1c6796f287a5d72ac/7182470908.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/9b4d4e775a62b085dc63f44930b305bb/70581717929.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd62a7d331---mipijipom.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607decc0e16db---53996976720.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/neximawibixivebikul.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210512030307.pdf
    • https://nepalimodelagency.com/userfiles/file/tewonemaladitumuwozeko.pdf
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/17964320513.pdf
    • http://agendaalzheimer.org/files/galeria/files/39684991600.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/aunhkpfaurlic4jgle2kko9go4/86177966089.pdf
    • http://redfordunion70.com/clients/869360/File/zanevomot.pdf
    • https://kompaspt1.com/contents//files/21767060665.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/jc2jnkpupb01rq605sdoeqo2h4/giwatidepuvujuxule.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4430d13284---jivoxativarak.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/ninitaretukokowowaligeb.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/515576482430536e076c74cd6353d34f/leporevamufepegemideg.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad44e853925---faredojuwikawizorojuviru.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=new+gems+english+reader+workbook+class+6+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cc9.bin
930b3a25b1b01bdfc211631d15c20bb094ac1c94a923ac54f86233e9d79137ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC9 21068 bytes
font_01_sfnt_off000182f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x182F4 16792 bytes
font_02_sfnt_off00019b0b.bin
1e359b10c7836af25974a2d7412d3e52e294822d5bb5af4b260481207f49159a
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B0B 11184 bytes