Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f47a3e25cdf3d46…

MALICIOUS

PDF

73.2 KB Created: 2021-06-28 21:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e3c70fb089fee8dbf94b9fd8e76a32d4 SHA-1: b768aa853b581b1a6dd7326e102c6d90187f3069 SHA-256: 7f47a3e25cdf3d461717830e72b7037192f0c61ea33d6e362204c79635a8afd3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The embedded links are designed to appear as legitimate file downloads, likely to deceive users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b2b243a1---nutozu.pdf In PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609e065052bcb---zurasavurusuwedemitow.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/94784664873.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/78353540011.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079564ca279f---50967321806.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/9bf199a0d6af8c426541e68855adb626/78177625616.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/lth9n1h0fu8nd4cfu0essl1pop/jawuva.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/posusot.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/kukemevasedeboxamijijid.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/k5fn8mhpcand9dd6a8fg9mnnd4/67461655835.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086ebeb1b0e5---27332091502.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/3dd292b706d3a913de1ef4a5ae544bc2/nesepopimawojemajogin.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070ed9c848e7---goxumepij.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c42202c4e85---99711061409.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/lutawofataxodikajiwijede.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/bd5781432fd72f95090dfae7e9c7d7a4/12813396222.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b2c6aeae34e56fb5607bd465892c01c1/vefebowupekasosuzape.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4885a2d73c---61466614396.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa93d6ddf95---zelajabekolatetixupeku.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/e26cb97a00f9048c00fdf83d6e87edfb/putenebo.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/kibenimili.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/29718711604.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/97947596237.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/15093325081.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210628082043.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pictures+of+hot+older+womenPDF 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 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_off0000bdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DA 10768 bytes
SHA-256: 1f1ce4598235cf46c80b6ec1499b6daa9b3cfd61b739f5877a03c01151c419ff
font_02_sfnt_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 15940 bytes
SHA-256: d67d6906e49958fd3c342169c44e8520a405820cdc0f9b6efbeaf2357a7c3232

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