Malicious PDF — malware analysis report

Static analysis result for SHA-256 790f627114406386…

MALICIOUS

PDF

86.0 KB Created: 2021-07-16 00:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: acfe506d3fdbb2eabd43573799fa2a02 SHA-1: dd3a40ec937017a9a8b23372a0055bc5ccddb2e7 SHA-256: 790f62711440638620edad071c8f5990ed03801977d492e32bf989dedf81b4c1
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. The document body is unreadable, but the presence of numerous links to potentially compromised sites suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c9408bbb4074756a96746e7ad73372a0/nabos.pdf In PDF document text
    • https://partnyor.az/userfiles/file/zogaxigizagef.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3d3eca16f---fuxid.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/6395640867.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/kubufokadetexux.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c657245f635---18864260686.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/31879462013.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/77725881197.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/potudovupatanofanazeru.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608049b6651f6---47325551170.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/0qgs6cv2jmh5chfa3flddvftqk/zapotopivofobimi.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/76hta28bve5228c6efagqeau83/45060887057.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/perokab.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/mujtfjhn29c9uvs7mrq1hjsp02/22823395122.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/b4e31697f5d17e3c0c4900393f6d4b52/24826844225.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/rebajizuwowewop.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4u0qonhjujcd41ql3oqofkdafj/piperomokaditetimemaz.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e3dec044---46138858296.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6da422fc67d1c6fe5b951d5e10adfbd0/nubedotaradajubibarega.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/50744638729.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/kapemekuloziduraw.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/vonolevogulutujutefisavi.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/173705004360cb1cc368fd8.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021060500022494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=all+things+dazzlePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 17372 bytes
SHA-256: e7a6983ee46fc7f2f24ca90f8112d69aa9439f660f15815d505d3923d9330a90
font_01_sfnt_off00011bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13403 10348 bytes
SHA-256: 9ea1622609bf9ac272e575661af5961385417e72618b017c832ff8e90c75ffdf

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