Malicious PDF — malware analysis report

Static analysis result for SHA-256 422d53c2f09d525b…

MALICIOUS

PDF

91.1 KB Created: 2021-06-25 14:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e40a98c9d96d63dcb206a1c1851fccb5 SHA-1: 2930005ecedfaf0f203f3ab020266e44bce01d0e SHA-256: 422d53c2f09d525b413529793c7d5f448452e38d380f7b65c90b9c3388518621
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cf4bfb058a9e7fb40f6671a6dd636d37/pubewajawonisa.pdf In PDF document text
    • https://cvsc.co/userfiles/file/75693752337.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/lifegamutotifurotam.pdfIn PDF document text
    • https://dm288.com/slicice/file/90437653730.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/4eeabffa0c73662615b16905dd2f2108/62241656212.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/125a0150b5f6d250f19a13d54e689260/97848599164.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d0fed56e9---pefomir.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/polamurisagowifonu.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/f70b7df39e2347a6560b2da48557afcc/60595396537.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/ziwuvipujixukomufiz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b578b43c5---xokomafenetewozovedar.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/59ed26f1981bf820ca308543de79da0a/vepowa.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cfd018edb---23079531260.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/19813561258.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/doxesikujo.pdfIn PDF document text
    • http://slsnn.ru/content/file/99257692908.pdfIn PDF document text
    • https://cristalensi.com/public/File/vevejuzeniwejifobutipomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+theory+of+evolution+of+species+by+natural+selection+was+given+byPDF 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_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 17752 bytes
SHA-256: b16b8b567a861ec192fe96845a508e5482756d282c959fa761325730a30174c2
font_01_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 11228 bytes
SHA-256: 42403b81ebadcd291c0699a20c470a650575b24403fcb6c938738f2632be72a2
font_02_sfnt_off00014713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14713 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1