Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ecd1b0ad50fafe…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 01:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: bde931cad8b9b007099377aa5e4bc6f7 SHA-1: 803b3004a7b9f28c2f70e6ede8e8ef68b2d74209 SHA-256: 94ecd1b0ad50fafe5453f66d0a58bfe3c40d8d079b204b62968b8e233fa55062
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/d1fb0netj03koia7lvnl549rf6/10907765832.pdf In PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1c7e7b085---fofapal.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/31122579234.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/57988952493.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4c2deeac1b24d0b612a890f8161ef0bd/72618786281.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/fb333581593b4e346c45cc93de55b68d/vijukerukedifaduxatof.pdfIn PDF document text
    • https://kultmotor.hu/images/files/50758488879.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d08257bc9c0---wulijarigidogawose.pdfIn PDF document text
    • http://oodow.cn/upload/file/210626204333568291sz9ounmjba7p.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/34484287588.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c4cd0217beb276034b1e94f31b8fceea/73783717369.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/53932770132.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/15319047260.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f2077c371---2819531113.pdfIn PDF document text
    • https://atrax.hr/files/74501795300.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5q2qiqgh1jorn67bide75n5co7/68937479759.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/098046ddab9113561690d9bc00cf7ac2/99175274205.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/55484537187.pdfIn PDF document text
    • http://cartopack.com/Images/file/ligusoxuginomewaz.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/qebo7vnh53s0ls2ie17jd6jae2/najoxenejifewuvujivoj.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/89600590935.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/22403266771.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/12753637112.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/59700456012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=franchise+operations+manual+downloadPDF 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_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 17508 bytes
SHA-256: 5e8f44dc6a495588d31d5077411a2341671dc73ce29c7f295d3608d1b53d463d
font_01_sfnt_off00010e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 10940 bytes
SHA-256: 23c087e1e10fabdfdbab89593d38ca8a4d114a011e180c1007271b4a0342eded
font_02_sfnt_off00012790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12790 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1