Malicious PDF — malware analysis report

Static analysis result for SHA-256 057a724420efe738…

MALICIOUS

PDF

94.6 KB Created: 2021-09-17 16:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1e8134b2cb6d8fb0c90407f1de68aa00 SHA-1: d094d699405ec60ecb61fe362006f83805f2dcb1 SHA-256: 057a724420efe738f2a5f2d3c0f78b4fb70a1f0b7b1ef61ccf77fc1358654ee2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a phishing or link-farming lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. The embedded JavaScript is a common technique for obfuscating malicious redirects or initiating further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=gta+sa+mod+menu+android+apk PDF link annotation
    • http://facilitymanagementassociates.com/survey/userfiles/files/duxajitipivowitirorava.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/furizezejazowak.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/27673407378.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137d85cbeaf5---niluwo.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/42197565059.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/54147309916.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/42333659110.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/68788773732.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210917164553.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/32161087914.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/wevejorefevenej.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f64dab09985612a2aaee181da09c3e28/60176426907.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/60245855729.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/47627166218.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/97292757460.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/68978109512.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/24287570369.pdfIn PDF document text
    • http://dentherapia.hu/files/file/81613674515.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402408b0bb6---sizezizufizanuf.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/69762810248.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puxej.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/11306179692.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/79620863139.pdfIn PDF document text
    • http://masonhn.com/d/files/mekusomatar.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_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 10740 bytes
SHA-256: 90f36327ada53abc4c365a906b0a22911c426ad540f7000e6bacd5f0b7674069
font_01_sfnt_off00012232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12232 18904 bytes
SHA-256: 7da742d77743bf2cb92a3cf222e92d4a95b592515ef92099ca892edc0e14c2aa
font_02_sfnt_off0001534f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1534F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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