Malicious PDF — malware analysis report

Static analysis result for SHA-256 9089d9892f62c43f…

MALICIOUS

PDF

75.4 KB Created: 2021-09-08 03:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b94d3932fe3d48847d6cfe31c413f1b SHA-1: ed21377c160aff88dfd043d1e59ee1a885ae6e66 SHA-256: 9089d9892f62c43fd7a8739793ae578e4c959790443cda3e6dd419c9d4ff8852
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress upload directories and other potentially malicious domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the heuristics and the presence of numerous URLs indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe56bccfdfb---ferujujejopet.pdf In PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/lunolusarivumalevamu.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/begekurexovulegovu.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/dilaxudofuxedixaxavomoxoz.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/6107284393793783dfc8008c025284de/jawetopofoka.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c742cedb2550cac2e0eaae45924d444e/63929418325.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/44372181460.pdfIn PDF document text
    • http://cke.hk/userfiles/79690249979.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/90824391921.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97d04c044---63657423959.pdfIn PDF document text
    • https://tekartltd.com/upload/files/lozegirogetupelitova.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/012915e8a4a0db9c07d21a55743a0b0d/63059044802.pdfIn PDF document text
    • http://novichiha.ru/pic/file/91470836692.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///202108114566_368556628.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/motore.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/23416481232.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/56712960406.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608f99e6940e1---88494204072.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/jaziwaxawasigatovironexem.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612d9a3cc58b5---digaloxedumoduse.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/jetumib.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e71b93c5b7d---5487619784.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/42611581645.pdfIn PDF document text
    • http://sushibelovo.ru/files/vipuwibewe.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f872aa3f46---25572274087.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/malejusekiwimetuniv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=flight+safety+bell+412+pilot+training+manual+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_off0000bf76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF76 11528 bytes
SHA-256: 2595f15ec8011210ca6ca51f4fc105826549ae98010dcb4aae57251714e73b74
font_01_sfnt_off0000da43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 17176 bytes
SHA-256: 26ea70a1a5308fc8e986d96d6665762981a4c942cf9c9ae6ff6a3a8b6bc067c3
font_02_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1