Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d30028e99fa2c87…

MALICIOUS

PDF

78.6 KB Created: 2021-07-28 02:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ce971da0e33be7a8faec9eadf929399b SHA-1: ff7f6279ece46a24ed19c4f00a28ebc5f46992cf SHA-256: 6d30028e99fa2c87419b161162e3008490ebf534b54a542b8a60ff413d3427bf
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many of which point to compromised WordPress sites or raw IP addresses, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://binarbaidservices.com/public_html/userfiles/file/dabinaripe.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/db80c1ef02bd0d6d232bde74a29fd627/98079228161.pdfIn PDF document text
    • http://ashioke.com/images/library/File/kipigalilufekej.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713f62f0884---jinusujixoxisujavoluma.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/53794988100.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606cffbf0da85---40191245769.pdfPDF link annotation
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/90acad7be1cdef1f78f13ecd37f7b74d/bagebutakawegexonuwiv.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751554eb5da---xulezibewulomed.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/88251222387.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/91912347329.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/90985498764.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd87b051bb---37448385633.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/sdd2qfe9a7guarjeo5ant4vhbl/leruribotaditapazimep.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/21327199989.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/tapuranonolegamekubake.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714cceee0f2---84668837904.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbbc52db25---verowagikiberexabapozuj.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/feecffc665caff8e1e3684ba31b91108/46291228341.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/d0r4ls32fj61434d299jl6hvi4/kujopurulewumola.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/92068513192.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/c0ac9fe749beb40fb93c4a0bbd59c550/46830752331.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c602ac295---gubojexewuvoduxudukuven.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=crisis+on+infinite+earths+pdf+free+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_off0000ce28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 17072 bytes
SHA-256: b8f04cbfb9ec43d99a47299a48a0f6975caef001fb679412558e8dcadfe3c29d
font_02_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 10712 bytes
SHA-256: 12cd089e6150247d6ff7104a01caa56ad711a7d39e6b1e4efcefb1e5735956fe