Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdaf327e7940297…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 21:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 42769d5616abf6ddbcbc209f58dc9272 SHA-1: 8fec951cca14c9b16919b25df747fde45ff90278 SHA-256: 6bdaf327e794029709c48a5c5196c0c6a39e90c9bbc81c306637312d2633c172
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://fixmyhelicopter.com/project-new/christianbook/upload_images/file/57690689042.pdf In PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab41985bf2---61710536968.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/81951347298.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/virubazomojegeginu.pdfIn PDF document text
    • https://nasikampung.info/contents//files/94627144268.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082aa709fbb9---juwenilelabewuwuxodi.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/37155516001.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608595ca8ee0b---dunasipomunivez.pdfIn PDF document text
    • https://adikketiga.com/contents//files/keguligizavelisutitiku.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/vulevonupopepamebid.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/zomidedekotafasesok.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/xufagipisegisav.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/taxerupuxodapevidewu.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/76995281384.pdfIn PDF document text
    • http://czminghe.com/upload/files/95841945358.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/wabanowa.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/05ffde8c8b78ea3a41c13569ea46040c/51079866206.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/44246440534.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/nokoralukurudodokadubut.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210720192110.pdfIn PDF document text
    • http://metallpress.ru/files/27527147658.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/bukovejutalumuvifibisovi.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4234f63af26f314690fefb0b0ef67623/98560010948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=embryologie+du+syst%C3%A8me+respiratoire+pdfPDF 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_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 11232 bytes
SHA-256: 1fa17d973458a5dbdb72214d1af3f698bf1a51089e14052ea66e190239e020ba
font_01_sfnt_off0000f428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 19416 bytes
SHA-256: 2bf625382167035f5177a2c2656403e4c7b2892dca74fbcecf6c57d539b9e84a
font_02_sfnt_off000124f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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