Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ed05a4854cc736…

MALICIOUS

PDF

99.0 KB Created: 2021-09-07 10:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9c439f7c52e3f3203e422c7beb6e2eb1 SHA-1: 01c23a017cdea22590c211790782c1e0bcfa5843 SHA-256: d4ed05a4854cc736901a712232e8c7dabf832cfe5a7c6618197e16ebd0856df1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many hosted on compromised or disposable domains, forming a link farm. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content. No scripts were extracted from this sample, but the structure suggests it's intended to lure users into clicking links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

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 https://akamercedes.com/images/uploads/files/6012936346.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/8e8c0ed2b41804ecbcb7f1604a0c074e/63286932457.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/koputinapapugigegojurowub.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/9698527479.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e63b0c8d8---12096689756.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/32052540545.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ca366e14a---42582260067.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/62518724309.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/18116460256.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d9389aee27b409bcaf8d812a03de7ac6/sosovotixoraporu.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/30338984152.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aedd64bf750---40617187738.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021082006440663986.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/76544990760.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/65477607428.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/43301197263.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/44702009222.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/wokalutizazofotafopepose.pdfIn PDF document text
    • http://parilka.by/var/upload/file/gopufilujanipoxogugupute.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/12eccae30e71c9cc1f33d16adfa1a719/24895769669.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e4dd7192a---74394039941.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210615022953_c86565.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/tugajarenupujog.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/semidugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=c%C3%A1ch+chuy%E1%BB%83n+file+pdf+sang+file+jpgPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 16984 bytes
SHA-256: d7bbc1fa644dbc78efcc2dcbdb42d12010efbb7634ec5f505dd9f9599cdf07e4
font_01_sfnt_off0000fd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_02_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 27172 bytes
SHA-256: e7c61ee35e8d2a54ea44021bde83e569421dadab2a3565ef73f04ac00e749389
font_03_sfnt_off000148ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00016103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16103 11372 bytes
SHA-256: 5af32c67c2013eaa313da26acb4ff1fdb2bb54bd135f4e4dad31cd194413e361

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