Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafd00e7fe5f52ee…

MALICIOUS

PDF

75.0 KB Created: 2021-05-25 12:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0e064b0cd30fff9abec84e924719a29 SHA-1: 3ee0a6cd1cf7575fa1f8e6606d3521652971bb65 SHA-256: bafd00e7fe5f52ee036dedde630f34a63d429fee4cfe0d4078a83a814b39f2e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. The embedded URLs and link farm heuristics indicate an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ahcxdq.com/uploads/file/280210152801.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608120d68359f---21687632810.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/tcknpalkmqnskrbskc42kv1l72/13575617148.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e944676ab7---ririnosokaxidakajiji.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b4392cd4e---pexixezufepadozeke.pdf
    • http://dioceseofniranam.org/userfiles/file/68405601320.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607407d1813f6---32274341190.pdf
    • http://maychamsocda.vn/images/userfiles/file/nanaza.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/vtnv4di6puiocc88np7h631m79/matusaz.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/f6d2286873f81f93c565e4e99a54bbac/37762104832.pdf
    • https://energooptima.hu/upload/File/37254993879.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2780179d52e7d236d2ffaefc350401a8/sulufirigepabet.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/fb158127d2cb6f3baa054839504b34d8/womebajewagimev.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/i0sc38aqmocfrsq9dhjrg9e4t2/34484478848.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160864a228b67e---fukabajisa.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/10a533e90431a4b519a473b206805ed7/wopojafesunofowexemogofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cafetera+nescaf%25C3%25A9+taster%2527s+choice+system+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b7.bin
320fc8d2ea20f3ae74bfbe22e8d09fa81b5eb77db71e989ab141e36b41a1040e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5304 bytes
font_01_sfnt_off0000e661.bin
a10565fe0c045134828bf7ac34902b3546464b04919082f760bc8a7d8ec89044
pdf-font-stream PDF embedded font (sfnt) at offset 0xE661 12140 bytes
font_02_sfnt_off00010e0e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0E 4324 bytes