Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dac7cb5dcc346ae…

MALICIOUS

PDF

102.2 KB Created: 2021-08-11 20:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3778c33f3dc55bedeb4974749bcd814b SHA-1: 57db8ba482e3f1bb15ca4d6db4c1f12d989c156a SHA-256: 1dac7cb5dcc346aed586a449b46843bb47fd27c1dd8a39dbf4fbd36828bdb6fe
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous links and the nature of the detected URLs strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085527796d2b---36591074375.pdf In PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/hgco1sb4gs7mpr2d2bmhbp16d3/1390613791.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/18418343114.pdfIn PDF document text
    • http://yoron.net/up/files/64010106599.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/eb5b4a0d6baad629048c0d1f8c3463e1/retelopetumadivofovusebi.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/6126dfd8e911d2bb9d2ff0d06a1a088e/nesukevolijujuxobebupili.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/f97a808d682aea51806b90bf8eb33a92/fibog.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/94823062113.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160da1b7ccd82a---pazobumewudojapawije.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/18947454876.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/vigoxedimosisusaf.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/gupajid.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa2b87ae6d---22580073021.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/wutebadowab.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jl62plnpitnpee1uv63d5l2rid/70021285119.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210628_030438.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/tetirujunonoja.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/qaa6pvmrlqhc4sc448q1f5gc87/97410729551.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/20330302472.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030e862c01---ginavowosoduw.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0975f2f1aa---vinafowilegubati.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae83a60ed8---livubagorunexuvomupowogeg.pdfIn PDF document text
    • http://hnatiukreunion.com/clients/b/b5/b5561851e3069b632e798ef7a1275556/File/konuninufusuvox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+sims+freeplay+cheats+unlimited+money+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 18020 bytes
SHA-256: bc6a6075cd767f8547b6f79cc1da25fa80754934fb54424720a550d3c6c9b983
font_01_sfnt_off00011e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6A 23752 bytes
SHA-256: cd4b75bebcf6316e830f3691b9c9bb6a78ef592605c9a97459de35e094169094
font_02_sfnt_off0001569e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569E 11064 bytes
SHA-256: e2fca481c02c81c11d8d438607cc00504ded77971acdb014de1e50d865beeea0
font_03_sfnt_off0001703f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1703F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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