Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ae769a2968da42…

MALICIOUS

PDF

74.8 KB Created: 2021-09-29 03:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b559ff69ca4a5d3e8ebdcc293468200 SHA-1: 460199d14ae781d967ec446447d63c9c36fae8af SHA-256: f4ae769a2968da42e9f388e1141c563b36a56a8e89ab4e96fb38304cdd1588e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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 http://globalsublimation.net/uploadfile/files/derobofitivizanefivata.pdf
    • http://chrislahoda.ca/userfiles/file/48929734578.pdf
    • http://dienhoabacninh.vn/webroot/img/files/39956573514.pdf
    • http://ch-bovi.com/upload/files/xapujitos.pdf
    • https://elnativocoffee.com/silver/upload/files/27885189942.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133f87872c7b---68798013679.pdf
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/81308432926.pdf
    • http://kondicionery-shodnya.ru/upload_picture/file/23277921018.pdf
    • http://domario.ru/userfiles/file/29623555020.pdf
    • https://www.netcorp.hu/data/editorfile/fepagifob.pdf
    • http://jamalcar.com/userfiles/file/7157951605.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b5b5785b---vebanapijavonuxufumo.pdf
    • http://bn-biz.com/userData/board/file/wekinedip.pdf
    • http://php-lounge.de/userfiles/file/28875101672.pdf
    • http://crocepadrekolbe.it/userfiles/files/37914745982.pdf
    • https://sankaibearing.com/userfiles/files/41358348210.pdf
    • http://chandravanshi.com/userfiles/file/77920556316.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c4fe5cb57---xanemeb.pdf
    • http://longtra.vn/userfiles/file/xutulidizapopumeminimabas.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161538a321d828---gigajomejawopusu.pdf
    • http://asfalon.com/__files/file/xawusalanomul.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614a3894144af---6364253386.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=best+free+voice+recorder+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf67.bin
42679119a075df688982296539ca1fe2ba7faf6513e6459de838ad42cee89f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF67 19196 bytes
font_01_sfnt_off0000f145.bin
305c3698953af89a358bc409e43a25e908d8b7df1ba5dfefdc0fcd2c46c0856d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10540 bytes
font_02_sfnt_off00010986.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 16792 bytes

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