Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a57390cf46bcb8d…

MALICIOUS

PDF

72.3 KB Created: 2021-09-06 22:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4fc7bca722abb1888c1458faf61e87a9 SHA-1: 37578e3fe5a1ec235f866df6466f2bd3c49de3d4 SHA-256: 7a57390cf46bcb8d889d1bf4089cf5d61103bdaec724ad600615727d71961312
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of 'utm_term=java+rmi+pdf+free+download' in one URL indicates a potential lure for users searching for specific software, which is then redirected to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4f60326490f15041791e16fdf3e5f605/46182019780.pdf In PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/sajogexebepowof.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/68902776904.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qmc24muc4i15re40gfra8p0s2s/jubugojenewodowenobakij.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/82949253551.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/rirabif.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pebinodugiwevuwirelagino.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2268c4b92---11494117032.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e09c462dd8---78385546334.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/xeloparepakinivifuf.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/lirivugoxitepa.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/5btas8d9c2pc94cqsu20isukir/bevaxiruvifazadib.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/gokunupezozumonekafapo.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/84752665841.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098399bb0efe---3723672316.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607970b302633---99721632786.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/xugimazozivok.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/19710285470.pdfIn PDF document text
    • http://rentaruedas.com/files/others/44379264300.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea3fb3c093---nojesuxisugaturexepuvana.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a175d5850---sozanawijoko.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091df5238c14---birid.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210829_7F2B31D6CF821AE9.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/61656310b87f49100e52549f0918c7cd/zujazikekez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=java+rmi+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_off0000b927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD139 16544 bytes
SHA-256: 8e68868928ea185f70e01b2f5babd446db8ddd153fe46c1e732d0e09d5999c77
font_02_sfnt_off0000fc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 10536 bytes
SHA-256: 7d422d7de3039dd69b3b590aa2b07fb34564159548065f75d719fc5f9113c449

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