Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d00489a45e6fbb…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 16:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b11cd93f0de26c1436730ec1f57e234c SHA-1: 7c951bc1969fbec00d37617ebc15a784770e130b SHA-256: e1d00489a45e6fbb51d6c40980a15f4c8af7c87166ba980acb95dbe43ab09f9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, as these indicate the use of disposable or compromised hosting for distributing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://elai.kz/upload/2021/08files/210824191642241042zrm6r.pdf In PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/linotekefenore.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/24cc32a756c7fd5644633fd84b301b79/worotowitukuvafilu.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/25948601273.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/24298611642.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/94093717438.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/71190410837.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/dojexuriwuja.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/0f6616a22fce7141f81d3072bc18e961/mawotitefetiwaja.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/36760582046.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c6c097d4bb0270d6571d1556d143488d/suvokekutidobi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071fce46e5d8---664966106.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613195068a005---kuvovusek.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/dulonoga.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aadfe61073a---81603918120.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/bb26d345eed11cddb09a4feeca905362/80843328397.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5972b02d0---16189119415.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/jonimom.pdfIn PDF document text
    • http://skncn.com/u/files/29321042041.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/xunodef.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/dpma04puf7tjhk9k9hfdrhilu5/pixodewujexojuziz.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b32cba3ed99---40661343876.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/82845975748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=children%27s+stories+with+moral+lessons+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_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 17072 bytes
SHA-256: a6846f169bbb5e7f6f911891999bb535932e1fcc93e7bff06b6d364986fb13e8
font_01_sfnt_off00010a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12229 10912 bytes
SHA-256: 8ab70810eac84de5690e9874ca0b5d08599d4ab1e8b9aa7b7aa973a07f5cc797

Open this report in the interactive analyzer, or submit your own file for analysis.