Malicious PDF — malware analysis report

Static analysis result for SHA-256 be00b3aecba2518f…

MALICIOUS

PDF

69.9 KB Created: 2021-06-08 08:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: af7abc964878cf0ce7d9618d8f2c1b1e SHA-1: cc059869d0984ce454393b39d3a2c7dde6f0c9c3 SHA-256: be00b3aecba2518f499ce5332c8212690e99a3555d37c711c80104a95da8e268
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations used for file hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed as a link farm on disposable hosting, likely to distribute malicious content or conduct phishing. No scripts were extracted from this sample, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

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 https://archism.ru/uplcv?utm_term=worship+songs+about+togetherness PDF link annotation
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab377676be---60929314865.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/39763884867.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd12f2b747---melidi.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/98491230646.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a84535fa---36761823060.pdfIn PDF document text
    • http://gyobel.itpublic/file/13497725794.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6c3af8b5---65747512292.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/4uekqt30cc3vmlbatrcb27sjd3/bubefaj.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a435e051a---mekafobajegesive.pdfIn PDF document text
    • http://teknis.it/userfiles/files/18629941257.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ca77947dcc824bd0d061576ee261467b/77986975874.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/lipukade.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/tujobijabetizezinum.pdfIn PDF document text
    • http://envigest.cz/upload/file/45050930095.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160810693312ba---pusudebafugujek.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/93058539053.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0io9prfldrht8jq4ppnaq1sgc1/rilenomavetamonivuwet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 5200 bytes
SHA-256: 2706398fe99680ccc9e28f04d78d49b3da33ff2c705341110d1099113289e049
font_01_sfnt_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 10596 bytes
SHA-256: ade6b4db02948bd869969553db4fd5491d2db2e14effe030e64d2df09edd1d83