Malicious PDF — malware analysis report

Static analysis result for SHA-256 de205d0fe42224ec…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 23:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf480d423d5880e51b0e8f3f4c991560 SHA-1: 4ee6c839278f77871b91b8be83a1f26571b688b3 SHA-256: de205d0fe42224ec60ca28f9427fd720171729f16d56a4612f57afea90f76479
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress upload directories or disposable hosting. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://moveo-sport.pl/userfiles/file/61303562843.pdf In PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d679e55c7---fenufenevisasosupa.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3e085c1980bd5e2b2695bb194f47bca2/pedopugezurejojadixuli.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/35917948147.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/60829344667.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609481afcfa6b---15624748062.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/91959840839.pdfIn PDF document text
    • https://foreningenflex.se/anvandarbilder/173/files/banaloxenofaliwidimirav.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a666d68663---pasekebamanejuvisus.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/69450206550.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/nurotokadujavizuzag.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16092c94a65ea0---ganikuravajujebozanamud.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/0vdv67tqeuqtage54fcvpbqr1d/38235800436.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/molezumemuxajimesupuvenov.pdfIn PDF document text
    • http://caramelitos.sk/files/79123440304.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/25694506970.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/1961186375.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210816_134855.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021062900511370554.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/7643b4c3793c9a4bac367fd7b0827952/lazamixatoxutufogogarili.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6ae6954866---zamofes.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075dacf8313f---nofixopa.pdfIn PDF document text
    • http://geotersrl.it/file/99422705618.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b0de14fa07e4ca232307649551473226/24537369557.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=monatomic+ions+list+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_off0000be01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE01 16416 bytes
SHA-256: 7351871eb060819e0207c31b6bf72fb3b1a685c79a7955e5aec147da316578ef
font_01_sfnt_off0000e839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 10540 bytes
SHA-256: fec08a9b58b00e44f6fba5162fbbc68e04ef2784a6cedaca5fd5e37290ea2d0b

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