Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ae06d32fd623be…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 22:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9d2829cf26d222a7c2ed173135fe89c5 SHA-1: 239dc4e71cd22a0f479929ad5ee40f15aef7db79 SHA-256: 12ae06d32fd623be7f572a629d9231e115c0373ac160e629766513a9a7671874
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The file's structure as a link farm suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/36951917010.pdf In PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/saguluxezisizek.pdfIn PDF document text
    • http://saltyfeelings.com/userfiles/file/pedukewupijipazubuguwuzel.pdfIn PDF document text
    • https://bombapin.com/calisma2/files/uploads/nerinixoro.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/kakuxekumuxijosawe.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8odt3al3uklh7gm511h0bg5d80/pumokerafekatumusatevaman.pdfIn PDF document text
    • http://szpk.hu/_user/file/xujevuxizixasimigo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c3548cb0c---modizofimoxelorisifaluv.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/50840553075.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/30215862096.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01dc29bc65---falibebobabujororix.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/91283524403.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/zafivupadopejuzip.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/dejomozokuxubidilez.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f94e53c1---21473435728.pdfIn PDF document text
    • http://nebo52.ru/uploads/files/nabutixetuti.pdfIn PDF document text
    • http://calebdobe.com/clients/875189/File/kibabi.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac12636cfa4---sodijid.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/jixafefevodidudowoz.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/liregem.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/tizakovowil.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/55982621799.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/zuxazakexoj.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/20202001349.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609484fd13233---dawedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=html+object+tag+pdf+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_off0000d167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 18832 bytes
SHA-256: f2d5b541e3b92f123d1b8e54af3edf5971a76c80926b04ba75dde2da08b15572
font_01_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 10952 bytes
SHA-256: f6e58ab223ef151f8597b3e35febcba1c1a6d6b9d490b482979da400612edbc7
font_02_sfnt_off00011bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1