Malicious PDF — malware analysis report

Static analysis result for SHA-256 85361f290376df22…

MALICIOUS

PDF

85.1 KB Created: 2021-09-03 09:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f48abdf6890deb0575917a2ae114570e SHA-1: f1f08ae93e6bd16267146ac9a3ad75818357ac3a SHA-256: 85361f290376df22744afd3c342cd5dbc0df93049555ce7c71277a388bc31cd0
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics related to URI and link farms further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/c2f9ed1bf770e2254c1a53359f53777c/79262801673.pdf In PDF document text
    • http://commune-bourre.com/userfiles/file/durar.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/mozamalelukusubaserej.pdfIn PDF document text
    • http://www.siposferenc.hu/html/fidilovanufesa.pdfIn PDF document text
    • http://bakoca.hu/files/file/79249859680.pdfIn PDF document text
    • https://nada70.org/userfiles/file/34296630412.pdfIn PDF document text
    • http://charontrade.hu/data/file/30430268890.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/fijl39ns20153o6713adv7ukan/49505075517.pdfIn PDF document text
    • https://coluer.ir/documents/file/nexuwemo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608181095db0e---sagutagupesonetasopa.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/4067cc936937734adbbd5277e300cf69/9518867421.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/setowewe.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/47711674150.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/50960430916d86265a47561e08078c3e/84764766474.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/44770746.pdfIn PDF document text
    • https://rm-parketi.si/uploads/fizidupokagodozofuwamelud.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/7467a005ebf719c8eb3f90011bf7ffb0/62205319873.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/b12lv8j17h4v2nn2987njcn0i7/xukipijugevowexib.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/1763742699.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210722124239.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160742a139a853---wijudojubibi.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086a06fbca04---nusunadizoman.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/72183449840.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/jikakedewisanetazefabin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=high+school+basketball+tryout+drills+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_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB3 11232 bytes
SHA-256: 61f8a193a906fc798729eae39201bb497da364ec6a1798b8736261f08ad3969b
font_02_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 18784 bytes
SHA-256: cc43b6f3d7ba0f6a944dc762f2cf50a9c45ff881a2acca545b0d3503daa36548

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