Malicious PDF — malware analysis report

Static analysis result for SHA-256 9030013361d19fbb…

MALICIOUS

PDF

80.1 KB Created: 2021-09-12 03:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1dec30ca300635deb0c166a7d07dfbd2 SHA-1: 5704564ae86e589cb11ea7be66d2a13d15d4cde9 SHA-256: 9030013361d19fbb815612e5553b2a40df5317d2f057a1803f52c80088ddc9ee
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which are hosted on disposable infrastructure or compromised CMS uploads, indicating a phishing or malware distribution attempt. The presence of 'cmd.com' in the document text and the ML classifier's high confidence score further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are strongly indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://qdcmd.com/data/files/fibufijudixubasuk.pdf In PDF document text
    • http://riviera.az/userfiles/file/nidevo.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/41003237610.pdfIn macro / runtime command snippet
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161380da66f82a---natuti.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/65639658895.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/36707666369.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/44528091959.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/jopukuvelozewibegazewupow.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/80930042664.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139dffcc316c---rinojisesisugenerojava.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/11f9eb8fb113990a1c05b070f6187d14/68100413893.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/xusikuj.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/45693644113.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/d1a121e2dea70bd6aa0a845c052a9b8f/6334995641.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/logolikubip.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/55967636557.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bcdb87060---60149544952.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/gekinezimugibolosoz.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/15767377445.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210903194656_132233824.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/tolexarakedezumisejufo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138e55e299d2---74259879635.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/44850184114.pdfIn PDF document text
    • http://riviera.az/uIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=driving+recorder+androidPDF 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_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 10300 bytes
SHA-256: d28919da608280986d175ad913559c07d3b9ed12943892caad97b6638fe2d9fc
font_01_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 16812 bytes
SHA-256: 6acf113c4129bd44a7e9779f5f48c18d5994052ed05a0dd6ce7f56f6bcd3a4a1
font_02_sfnt_off00011abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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