Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e47a7316cc3019e…

MALICIOUS

PDF

87.5 KB Created: 2021-06-30 15:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 86f28701d1ba6aa8e65838326af827ad SHA-1: 7b3c8dbc4987860fbef9f6ab371515d53aeee801 SHA-256: 8e47a7316cc3019ed744faa818314de41ab0e2bc09292cf40cdfeeb1b9abfab3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress installations and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites. No scripts were extracted, but the extensive use of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=made+it+in+spanish PDF link annotation
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c02a550b81---zuxalijisonaweli.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/ratudupibuxuke.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/82259998690.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/60440092043.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ce2dcc7e3---bopofoputugu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/uik1l12kmhnq5889a5jqjvpoto/8813735632.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/8f424f73455cf19241f4040732db3910/fegagev.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/84634585805.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/35546382528.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075532e44fda---33646185450.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/vexeniwa.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/22277036978.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/9642203945.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a84758cb---tojopiguwusubitojelud.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/55250f4976ca5d40dbabb5f0a33f9518/rorupetexuwuwudobizeja.pdfIn PDF document text
    • http://veivel.com/userfiles/file/gutivesikiwivux.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/f5da322c632438bf6406b3843859def2/1076572170.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607df9ed91bda---20033950780.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9a10b768---61795740833.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/39211702091.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f330490f879ab4c570a6835c83da1499/texoxoti.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad4945cbc0---nozitaxiwafoxi.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1855eadf12636ed795776e9069cab250/belofatikekitepilijodipo.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_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 10216 bytes
SHA-256: c979cee046ce45d461e3dec4b9f5fb7ec4656b69b0a8ab9508da60a8dd20a5c7
font_01_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 18672 bytes
SHA-256: 1a28b5370d913f0deb75723386cdfafaa1b7c4cc9e7dc9a48c73198ce74c983d
font_02_sfnt_off000138e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1