Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e1a7265f0b67e9…

MALICIOUS

PDF

91.4 KB Created: 2021-07-31 10:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e2772c051bafb74c61c4a5731fdad9e9 SHA-1: 98e77ee54f1df150912e90fbf78b4719ec7728e7 SHA-256: 05e1a7265f0b67e9ad77ef6aee6892c4f87fee0fb37fc245af599a9530b00fd9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/9895dcf555b2889098802a6f65480d99/82036936425.pdf In PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1df66852c4---88683702763.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/mopadejirupeweluweroga.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607992ada9749---botubuve.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/mumelunevaxuvukivis.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/89f055b5a70e4526a092095e5e6a8191/zujuwedanipavu.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/gtge1qo8j6dnqr3l2s2uo09vvb/32258200808.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210608053543_gfpoyt.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16070c96a48e1d---24623146840.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/75576639605.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/2484676455.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/cc625a03d803e8d324ea17d285553599/23103724194.pdfIn PDF document text
    • http://www.heksan.com.pl/file/794970584.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/e65d52f72eec5c5806b6f5a83a8fca50/tatiragusol.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/84761162305.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/makamizojizeri.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/valituvuxepinabuta.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/r6q3claul5jptq3ch72l9focn3/14909531879.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc20d9533ad---78033990084.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/0lvh3lh0jdrk5d332l9d2sesv8/nolilib.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/85057719349.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=como+baixar+brawl+stars+no+pcPDF 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_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 19592 bytes
SHA-256: abd99df9c354d18cfa5221ba0813234afc81506dc498c123055be73e853629c4
font_01_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_02_sfnt_off00012ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA4 10760 bytes
SHA-256: 158f29bb60b6648ba97715f59c7a6d22f1b1c51fbffdee1ddd53cb51ebb9f6d8
font_03_sfnt_off0001453e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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