Malicious PDF — malware analysis report

Static analysis result for SHA-256 79370aee5ac16d01…

MALICIOUS

PDF

85.8 KB Created: 2021-07-15 09:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 384553967b974452065a7af2df1d0b40 SHA-1: d62a362e09365c368aecd4ab79260622d33591ed SHA-256: 79370aee5ac16d019734960132d1552f3531b14a00bcb864b35f2ac4f736d686
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of 'LOLBin token sequence in document text' indicates potential attempts to disguise malicious commands or URLs within the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://drafthe.ru/uplcv?utm_term=liability+caps+in+contracts PDF link annotation
    • https://floridainvestment.cz/files/file/petadikiwuvu.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/34086979460.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/3373ce5ea2e970c584bbe2106bcf1425/durozolurebifijo.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/02k3kca4fn7bdnro10k7jcmd5u/riwogoluxamigozo.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/40240396395.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/002ba9u9gufckhf0vijg7tkhba/16770742069.pdfIn macro / runtime command snippet
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080f1fbd039a---vanomawepike.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/605e1e7111ebb2d817187a8cbbdc1404/bopomuviwoxuna.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///36514223332.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/1kjj23k8o634akoks3f4fg6e6h/69783116686.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071508429052---50378423989.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/628b7e28ab80b37a592a7c08ea7dca1b/48314654539.pdfIn PDF document text
    • https://bselink.com/userfiles/file/15187590152.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092abcda82f7---9410814644.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/36639116428.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/b15bvkf77v5stcjppflrt1ejkp/kisapasadivimekexuxeje.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4aec409e26---65817874065.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/24154091251.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/24140299351.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e587ccab0d80016bdaaba8c3726c66a5/bitigatored.pdfIn PDF document text
    • https://componentcnc.hu/uploads/ckfinder/userfiles/files/49610014609.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/uIn macro / runtime command snippet
    • 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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 17780 bytes
SHA-256: a641c6517ad7158f3cf5227f868a08c8b6c781ac325be05a1caa3fe01127d4bd
font_02_sfnt_off000132c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C0 10444 bytes
SHA-256: e53af5f24ca8ec8f0b91480b3caa3878b5f5dcd16833a19bffa43bfcd75a0996

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