Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bc55db0e914000…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 06:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 42659afa385dfd6ffc2dc7dc4d5429e1 SHA-1: 4c28c941b0c6c9ad421acaa4414ea6253cb8568a SHA-256: 44bc55db0e914000a60a60cfeacc16cc8ac3213408bff29b5345d1daddc63e64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the heuristic firings point to a malicious document designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/2017924557102206e59a844a0c9c84d5/vasagiwolu.pdf In PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/51345740922.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/ralokamumubenokotojiw.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/a73416a16a5c369ef2782bada182403f/wagobak.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/tavekegoso.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2e0e39b62---96824423902.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ec38c0fb6---10645318760.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b212383d939---xibimubixikekawujatagexom.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/kufuvojupipuvebasen.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/jelem.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/95688432949.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/97720633347.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d4c210637---29454935674.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/2767592540.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/17b75cc5fffcfa383dc3b6d2dad341a5/zuzefujakesabagewepafog.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/27868637561.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609423e27e4f9---86054632308.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/goxilamigezulotoditowive.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128503494466---rubiwuduzoxipo.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/68353066449.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/fataxavalakijaga.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/47988570538.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/35868210574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=panchayati+raj+system+pdf+downloadPDF 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_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 17360 bytes
SHA-256: f598a5b327ad9d669c1a1e5a7800aa48cf0a49e235df26d4475c8cb753623c04
font_01_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 11216 bytes
SHA-256: abd610f0a1c319577fabb2ad2d2f914affbc2511422365a8e4d29368b4ded7c4

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