Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd034e9412bce3a2…

MALICIOUS

PDF

79.5 KB Created: 2021-09-11 02:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 225ff673c340a7b7ed8063ebb0e197b7 SHA-1: 93bf0123664fbeebe2b5236949a2d53a9b5c4c54 SHA-256: dd034e9412bce3a2d2430805433a20eca9b75eec6276ff22f19b006881ef6b7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://absoluteanytime.com/media_file/files/files/12085387004.pdf In PDF document text
    • https://manenshop.com/upload/files/10184719699.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/73294700446.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/76784100746.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/32933779805.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/joruk.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1c42380bf---53532438873.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/61402950693.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd4fb52ec3---73141553772.pdfIn PDF document text
    • http://synphabase.ch/upload/file/kikevatipipipux.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138277a36d0c---55903834452.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/xiwugafopukapuwo.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/xixug.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/kalazigexunuku.pdfIn PDF document text
    • http://sudeoksa.org/userfiles/file/20210904074433.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/taxineli.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/52214653908.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b487a5a46a---reripuja.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/rozusefisifililibexevezu.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0cb6956e1---tezugisub.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/kijoto.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/kaneguxupereweka.pdfIn PDF document text
    • https://hiroyoung.com/data/files/78968797304.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/benesugageboju.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137de7688375---nidimexonifoseguxabem.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/dunujegusezonakeb.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/22616157971.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=international+marketing+plan+example+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_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 16796 bytes
SHA-256: 2537dbc5557fc3b8e60f5ae7627f6674750093ad728cfb5b74b1667851d5298c
font_01_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 10820 bytes
SHA-256: ca88b70f6d9615d8d722f578b83e7dc12a4d25df31341effe3a9a7b38e1255a9
font_02_sfnt_off00011853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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