Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2748dee601fccd…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 18:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ae51f660844e5c3f570d88e01c25fa6f SHA-1: 00d81c33042c660a04dfe0088994f9bd4d5abea3 SHA-256: cd2748dee601fccd7e19e7b290fd49a7cd8fc950ac13e691d71fddabb972addc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://abwrosedale.com/uploads/files/76335889231.pdf In PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614950f6158a6---40405684190.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/mokozixop.pdfIn PDF document text
    • http://ccadl.com/files/20210911001155.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613176b0e5798---61331570745.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/buzusowunamuxokusov.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/99689956919.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0cfce25f76a5df8e3958698572f3ae69/jewunadivujipovefolege.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/77461235040.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/58283224837.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210906_110528.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/tifexewukonesope.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/98489685681.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/82590393747.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/66493041778.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/12512988152.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/muvemakabiledazolasized.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/814743a998755aa20e20240c4e6b833c/meleguzewugomamijigev.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/61360513061.pdfIn PDF document text
    • https://mklaassen.nl/images/file/47265668898.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/rogakaripeporutozuwoji.pdfIn PDF document text
    • https://10fci.net/userfiles/file/varogorarijamij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+can+i+scan+barcodes+with+my+iphonePDF 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_off0000aea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA4 16556 bytes
SHA-256: 22f49ed0da1d374ffb929479a4723ef48806770e995c4570d275f6c46a39a070
font_01_sfnt_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 11064 bytes
SHA-256: 3676d12119f010d421d5aa96d4f90e314a405afcf2cd3adaf1114c4f2a09f80b