Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b80a199a67fd128…

MALICIOUS

PDF

76.0 KB Created: 2021-09-18 07:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ee96665642ec0b658cc88c793e2454f SHA-1: fd74b0d0e36dd1bcbb6b960a3d3413ac60b72802 SHA-256: 9b80a199a67fd1283ca51220debc006070aa2aefe433607c91fcf73a05e45b76
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, providing no further context on its specific purpose beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://crewmak.ru/uplcv?utm_term=sao+manga+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e0612adcb---91554854535.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/nowabalurufifiwitonesa.pdfIn PDF document text
    • http://taxfreepoint.com/file/75862373731.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/tefenibubugifanoko.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/29188015829.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/42748874503.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/26036242315.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///mojiganomoradego.pdfIn PDF document text
    • https://partetesal.ir/data/file/39906609047.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b793ec9e61c6ba9364c1141a444968d3/62181629193.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/mikidefotovizajefi.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/93278033240.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614441a557259---tujatup.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/naxuwidipibanexijipig.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/kokumafisate.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161382917d60e3---51435906055.pdfIn PDF document text
    • https://akconta.com/uploads/files/taweve.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/26140609364.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/3f8c950535e90e4918fb4b6c75bf3787/39321940340.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/3300026946136da9f610ec.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/gowiforovexevukixafu.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/zegeterasukamosizexiwunog.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/61632278956.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/86446726756.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_off0000c34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 10280 bytes
SHA-256: fbe973c69fdea15af012cffe8134b9cb14c4fee3cfd899bbcec11649cf0d370f
font_02_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 18604 bytes
SHA-256: b9c73b8ad7ce77640fadebefe953357fe50b4464e746148dbe8dfbec2fad119b

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