Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb555006a4832cc…

MALICIOUS

PDF

88.5 KB Created: 2021-08-17 20:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5d26841c9dbc6c6b91634d7af34ff660 SHA-1: ad363d120789c8813c7df96e500c96709e1a4628 SHA-256: abb555006a4832cc213d1cf463ee79d9f8a5bdc5fcd410b137c77b0ac9df477a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://coretry.ru/uplcv?utm_term=business+law+book+in+hindi PDF link annotation
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e40a80ed83---68983639642.pdfIn PDF document text
    • http://standdominica.org/files/files/39407162886.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/gutobidibibopuserifije.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/18162767711.pdfIn PDF document text
    • http://usagimatur.com/files/others/43797957420.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/a0e4c190f129bff79132d0200053dd0a/suzogomimelagowasa.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/51191271066.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16091e4ac0fad6---jabefiwimitaxeje.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/xepox.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e61d18abd68---fukazo.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vuvewog.pdfIn PDF document text
    • https://manenshop.com/upload/files/nimirovoretefoxoda.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd69c89733---41395367939.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/eslk7tsrauu9hp8oco5ck0l3v9/88531526162.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cba929ccd1f28905622ab7f1babff67b/4851768930.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/bisutapibilamekutujir.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/26861118591.pdfIn PDF document text
    • https://rintrans.com/files/69742664088.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/97102680707.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/luxuraforajarofawokal.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff07d6e812---71304431044.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/8vmm9h9rac267i0hb3k1bp68if/96100216403.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/56304056160.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fdt6q8ht7sihm4t83n7h3a7gu0/55820537464.pdfIn PDF document text
    • http://jucal.es/images/file/nazorigifatenofiniluko.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_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9F 17184 bytes
SHA-256: bc77199e11e6f6786c4175f27a3b205249968dfef63c7b9c4c5188d710b69dd9
font_02_sfnt_off00013992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13992 10620 bytes
SHA-256: 68b42adae3ae843b4605878cd05c8f289072c975001c155d387ce43ff88741b7

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