Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abc18f44bb5069e…

MALICIOUS

PDF

89.6 KB Created: 2021-07-08 03:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b9447d74b6f22b1dc769470733bdb8c2 SHA-1: 8416bc6d86543e37c32e00c37ca3825ed8c491e5 SHA-256: 7abc18f44bb5069e1ce0c967f5bfc055c47ac068764ce2d3ed4ba17a14cb5aaa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple websites, some hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://alnadaoil.com/userfiles/file/39385656506.pdf In PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/n128sfqg8lkqqqopuk47qd467j/80932877408.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/67gul5kacs2k6u3oor51n0kg22/noxifilagudomukonelaze.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/60871468879.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086978d3c600---vibugonumenorakatimat.pdfIn PDF document text
    • https://emmaushuis.org/pages/jumipopir.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/84155012986.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/lulorisivipafisidozaniwu.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/fufibaga.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/n1mqgno9j7m9se9ns8s0drgaq1/19667172634.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608167cae6468---taripiputewisun.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/19424222352.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa3454b6d9---86717963568.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/592f253e630630f31660c9b7dc55da6e/vurelituked.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160714d7e32a8a---6523441969.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/38762856320.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/273d39011f5922e8bfb11cc55bd2dd71/84478670242.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/496c1eef64b61a747aeb3e798be5f3a2/33039398976.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/72387076556.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/75352859973.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/74941760528.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/kebametebis.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/kenutinapixipelopovul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=2007+nissan+owners+manualPDF 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_off0000f9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EE 18200 bytes
SHA-256: 0c2d77674e2e51cf20be14521c75869afea8ee329f63c9568f4f0370486af558
font_02_sfnt_off00014103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14103 10552 bytes
SHA-256: 6500112a8a3a3923b3f95c6870ba6baaec16fa8dc0b3a5aca5aeda5fa517cb7f

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