Malicious PDF — malware analysis report

Static analysis result for SHA-256 5577151d73bbc52b…

MALICIOUS

PDF

101.9 KB Created: 2021-06-27 01:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: babedef4b94c9aebfe1e4a1ded44da8f SHA-1: 58a85959d92badfdd4448c4f0947516a17bb2106 SHA-256: 5577151d73bbc52bf817f2b8d452d5e113ee83872cede1455bd3855e97e88065
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of multiple suspicious URLs and the overall heuristic profile strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f18de279---bebivod.pdf In PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083dac0c604d---mugedokixixo.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb614d3a37---nasawuwefirov.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/bulewileg.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9c11238b---60003724737.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/r0neqpvk4i71094qvbe3t7rtj6/pesexokuvogobabe.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/md2tucf9q7tpgvo92q10ugieuo/73901522201.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079051da3ae8.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/8be523a7092a8a172a2f2ba8f2cce949/44811893768.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/879f94d2bb5ea49d6a35b7ee5cf843e2/gisoxowaludutoteguwuw.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/71828058990.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/45875628864.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/b424edc538595b20215ed1552bc83c36/rumeromefivegetexeruban.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/mudogikonenigozagovow.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/eacc74d6d07966046c07e0d8ea8739e9/gokexaxamaj.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8b98c93f---wopanelulimuvag.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f4a84b5c4---7122093759.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/m0ngfqgoh9pu289kapeonff86i/nesixebarevulivonebi.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd7c68364---noduv.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/rn6v19lt1fcpdufehg6uf0jt5i/28968827382.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/74119353908.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106240357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=tom+brown+barristerPDF 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_off00012c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14488 10412 bytes
SHA-256: 409960b1d10895913b08d44855ca5d5a328bbb3d1f2269c1ee006ef157cec13e
font_02_sfnt_off00015c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C2F 17824 bytes
SHA-256: 80f7fa4ffbae80dfdcfdce153bbfac0318f9effe5d1195532c166b31de5014ad

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