Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74a746aede8126a…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 00:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 03e55dde44f42092dc544b8429f8caac SHA-1: c858facfdfeeec179ce8af600919c363a261d4d0 SHA-256: a74a746aede8126a82723038fc11e143968663cbf41a4660321d63298d8f0b55
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1bf2150c7---42304364784.pdf In PDF document text
    • http://techhssilverbuffs.com/clients/61416/File/nixebubapulu.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/58ec2bcbe213f39c44cd26bd80ec342b/94673093739.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210825002524.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/besavet.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/62134239818.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/40019867669.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/55950299244.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/95ca197a25d9dbe49e68366b44c19493/97144605380.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/vezoparaduremifubego.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c59809912a---falimom.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/lazinapagefiboxifex.pdfIn PDF document text
    • http://carszana.com/image/upload/File/51914092769.pdfIn PDF document text
    • https://pepsima.biz/files/file/joxipud.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/9uefslo8tbr5p2ve2t05l3gt2d/kisoxovajuwodiji.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/30109352666.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/utmlmhjp52unsgjpb5n8fdfuj3/62761491888.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/05/file/20210905_052150_157.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/fjj56utm0fk5l3uc14neip8d92/55844810102.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/80837680739.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/30886329497.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/muxurugexometato.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3a92289ae---30735713899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=tablature+guitare+pdf+chanson+francaisePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 19060 bytes
SHA-256: b3a224279bf2315c29a5073a7fe416f11f15874844d59f1d6de3f4ed1dc5fdb8
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 11104 bytes
SHA-256: e4e534cd669b6db9afffab729f5a94ec731fa294d38707fed39072cc056b6ded

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