Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a01c7b900cc16ef…

MALICIOUS

PDF

80.6 KB Created: 2021-09-09 12:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8c1538fcb05e06f9038ec36b4a66ef89 SHA-1: 146f4a61a4092796dc368ed2239a5d877d8d3c18 SHA-256: 5a01c7b900cc16ef9f5e6526c768bb2c8fe5b2dc42e66e0d464899304dc40435
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites or malware download locations. The presence of these links and the overall structure suggest an attempt to trick users into visiting malicious sites, likely for phishing or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://synerhu.ru/uplcv?utm_term=cut+the+rope+time+travel+hd+apk PDF link annotation
    • https://cargobull.cz/res/file/97714965606.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/12516275792.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/384ffbe3d20a89cd2982796c56e9d0e9/levogaxupumudigeviwan.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65626538315.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/3912633375.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/20780046453.pdfIn PDF document text
    • http://serting.eu/userfiles/files/98067107317.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/bipelexomavesuz.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/kevamevokafilapofolami.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137209c95b21---tanolijadetosezixo.pdfIn PDF document text
    • https://atrax.hr/files/fekuwubokuvajab.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/dokok.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/xosud.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/lenitem.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/85793170682.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/sedonigifiwivaman.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/ronimuzufolipudasekapikaj.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/85195299578.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/jutida.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/kizulegevubunapaxudoxivux.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/hvbp3snmgabo1uafmh52es020m/69423345316.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/wolupinoxipudusejozikipa.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/92115793885.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/95565152681.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/duxapopa.pdfIn PDF document text
    • 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_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 17984 bytes
SHA-256: 49362289f986d80ea3c2199c81309f6d4f5a632beb98975710188f2e2e3c8b62
font_02_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 10672 bytes
SHA-256: cdf20efd4cdfed196454db5ce58dfbd780f66a772b1475cd1fb08deaad1534bd

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