Malicious PDF — malware analysis report

Static analysis result for SHA-256 034d06d775bfb2d5…

MALICIOUS

PDF

82.8 KB Created: 2021-09-18 10:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5a17a4c9a703160f6cbd813913d359c6 SHA-1: 48110bb9c3e6ee2c7c7167f800b8ca12a3eedd93 SHA-256: 034d06d775bfb2d54a12746c2331e4e393db16b5a5cfeed7b43c2fde53eb5cb0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The embedded JavaScript stream and ClamAV detection further support its malicious nature. The primary goal appears to be redirecting users through a chain of links, potentially to a final malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://toyotaprius-custom.com/js/upload/files/72940153225.pdf In PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/birifujedogerosuroju.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/11hkdhcp2pvbi6r3i1tjohbsg2/buxikelaxazesuzuvi.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/bexoboj.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/77133630679.pdfIn PDF document text
    • http://wmsone.com/eimages/file/99340209471.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210911202339.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9edf2ee0d84240594fd8525a385877e0/pugiz.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/zerisixefifekuto.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/tabibidaz.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/wedemepixawokufe.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ad4c7d6dc21c9972136bf2ff781aaad4/23726906170.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/34653792875.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/tudafubam.pdfIn PDF document text
    • http://markone-tools.com/upload/files/7088862039.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/93014999548.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/9526600888.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134e827b10ec---berovumexoganominopureb.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/1585099559.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/87893691446.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/novejelematiwameji.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb6b90b348---tovaratedumubo.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/didimukise.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/65408526516.pdfIn PDF document text
    • http://bushurov.ru/images/files/jomon.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/81011585812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=fs+14+unlimited+hack+money+downloadPDF 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_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 11032 bytes
SHA-256: 234b6b96163f8f56b275f874973c6c2684b5705f6e04b2477fc606ffb78f073e
font_01_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 17136 bytes
SHA-256: 368e9ae6276b07a76ecb98311655018ce82ada5b0592f9f5509ee9575fc912ac