Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfb1f214ac9d132…

MALICIOUS

PDF

82.3 KB Created: 2021-08-26 00:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3739e65c07b93272c840bc5e2b3999ed SHA-1: af3aba0b2abbfdf7e56108a73e2a3f2dce1a735b SHA-256: dbfb1f214ac9d132ef1d956845ff4ffc11d2def0c346efa0af10a0ef35705111
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The document body was unreadable, but the heuristic findings strongly suggest a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd0a03823a---likepakifabofitewetamox.pdf In PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160766ec476b59---26911085518.pdfIn PDF document text
    • http://biomehl.com/images/content/files/sexigasesalidesimari.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/womiledugagevixe.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/98278494093.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6230cbf5cb6f2321b11bcf014a99429e/mupedurifatokaveluso.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160880429adf30---nogurukasuwasinabilifuz.pdfIn PDF document text
    • http://hopkim.vn/upload/files/59670472602.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/70360114076.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/6863691157.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c6a031213---30060462653.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/12938705651.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/a84g15458co7llv2npsaho4t76/640453189.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/62306364303.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/gazalavegivedego.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/61161979518.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/riwixonelekazetir.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb842ab9c09---13473901366.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/32379963705.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/78760489662.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/10a84def2c37f17bd79b83ede3459a10/solidebetenevarur.pdfIn PDF document text
    • https://arendic.cl/files/ninosasilupobafa.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/vobagatoxufote.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/380c46bf653eba8a10da6b8f640a1343/79893766875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=guanabana+how+to+eatPDF 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_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 17812 bytes
SHA-256: 0857808ab185063162b631e9418be5244820a333b0c2fe26d8fe76c8c0eba863
font_02_sfnt_off000124a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A1 10164 bytes
SHA-256: 428ba62eba8332b42dc3fb0c6bbf081cfe051d877e10c55403dc5b08692b3498

Open this report in the interactive analyzer, or submit your own file for analysis.