Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dc6030f6b2b230…

MALICIOUS

PDF

98.1 KB Created: 2021-07-06 21:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: adc3ef6c7b36291226352a5781202343 SHA-1: 14bafdce7d03aa110a825a9e766cb6c04bded7e9 SHA-256: 07dc6030f6b2b2305ea89e9ebaad77930e4b13ad8f51197bee4e6f4f169e702a
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to distribute phishing content or further malware. No scripts were extracted, but the PDF structure itself facilitates redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3e53915cec21c80dfc073f73ae58dac8/kazumesasutifuwopozivobad.pdf In PDF document text
    • https://nslogisticservice.com/userfiles/files/91738948239.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607126283b549---12194095032.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/be32a7f18873602db8cdab1342e6a135/78311481051.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/49ar8g319p6dl9lia33nspdtjs/8110819921.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4adc043f---sijesapaxukotutixiwer.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/70529975685.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/tumomep.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/baxadup.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6rfavhsf45ng399c3oa05apsq7/67108290279.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e80e679a3---26637417760.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/9bag9qi4iprf4g23dj1usnmk0h/65421189643.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/23456329425.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/degulatidixujotizuxatuze.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef7a76f7e2---lirupebi.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/85698310401.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/kabomilelofivuzazezepe.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/h83vh76pjpjmtba0t0cc0469fj/54075051380.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/87790394244.pdfIn PDF document text
    • http://asustainable.com/global/file/kepegogisugikowe.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/3144763986.pdfIn PDF document text
    • http://asustainable.com/global/file/favuxuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=exercicios+de+ingles+there+is+there+are+com+gabaritoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001167e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167E 20020 bytes
SHA-256: 423702cac15b9adbde6867215092e3f7c20796bd069f0d360afa063f73154731
font_02_sfnt_off0001479a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1479A 16548 bytes
SHA-256: cc9d1ca4b87b6e3c508aa543ca8b9d53c2bca2539b705eb2763098d2a8931238
font_03_sfnt_off00015ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED5 11040 bytes
SHA-256: 6b6a62bcb221221923041a3e197c123e9a39b41c89cef6a3e6dbec1d9ec1a457

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