Malicious PDF — malware analysis report

Static analysis result for SHA-256 145e4efd6e477eff…

MALICIOUS

PDF

80.1 KB Created: 2021-08-21 05:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 546730cef39594783ed65569a818dd29 SHA-1: 964a57e4c0772f856e23dee894fba004149cd6bb SHA-256: 145e4efd6e477eff907c4c7cee279cdfe5c3455d855f6dece51368e5693d7159
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised CMS platforms. This suggests a phishing or redirection attack, aiming to lead users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://tramtronbetong.com/uploads/userfiles/file/71002207502.pdf In PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/kuvifozevimosizonof.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/26482769108.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9324d8d29ce0b0cf4602f3cdfca4c02f/sobepukumexafegovu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2fd8adef---pezoj.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/ramaxujunexobezonovi.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/figasuwematuvoz.pdfIn PDF document text
    • http://fkhd.cz/data/img/tagasof.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/035dd7070e64e373843bc13ec19d1be9/88906919900.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/58950049360.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ca5hvob5qrm3onovmri119gjs0/larodulu.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/68386126707.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160853e6466188---4405953227.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aeac64c8d59---25250559794.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/98473392788.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/24316409842.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/dudonunagewato.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609915ad6dc64---94680216956.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/2pq7prihk00vo2klt6pkep6s97/67062366575.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/31453833479.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/79975101493.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/qgouejc1qggpmeq3k67m9ardc7/loferor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=geometry+medians+and+centroids+worksheet+answersPDF 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_off0000d571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 10920 bytes
SHA-256: 29567e4cd6ff3da73c46164d7f6299fe2d864bd78b9ac8082a01db941f2dd52f
font_02_sfnt_off000106c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C4 16620 bytes
SHA-256: 982b6a8b29373d416874bfce740014fc58c30eb1447ba2beef25c0db12c6ff49

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