Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e43dde03158e3b9…

MALICIOUS

PDF

95.0 KB Created: 2021-09-08 11:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 817cae719bd41857673de12534d0d55e SHA-1: 25a9f9843ddcb3aebe1e8d70d14dc5e8cb8ddbca SHA-256: 7e43dde03158e3b930172a8dfa052832db69b8d89c0d1a001f11ac8eee87af01
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics points to the document's primary function being to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://mbcasc.net/imgs/file/24747892008.pdf In PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/dutalulidewiladoliviku.pdfPDF link annotation
    • http://recrute.fr/files/files/35464697284.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f19f7395e22acc5a8bedd48d5d269740/tukasodudupanatozuguw.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/45705546114.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef9c38bdb---misakivopaxot.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/75703248179.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/dapon.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/wuwofuxefodubufopib.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/0908e758826651f20cd8d97ac458d4a3/bekojugaxutowapo.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r01rbarktr82c4n99gir6h5h67/lifoniloxupowabigawofi.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/biwuwosavitavimipidifazo.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/kuvitorusorotawitaw.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f2b9d3091---xemejomubiwasotinunona.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7216aadff---zowusisezuzilewazar.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/d8fba89836d431905c300e7f6686e82b/liparujawuki.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/18430085184.pdfIn PDF document text
    • http://skomi.ru/img/files/file/mekefijeratu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ad5e8dbaef0c69fb5e72e320a5fde45f/funatafabuvarikuko.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/us3pmvfus1l9079j6gf03402dc/22516388913.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/828d0b4194dbe219a42ac646d7206f5a/fojurefoxubebebejo.pdfIn PDF document text
    • http://keacg.com/upload/files/81345557160.pdfIn PDF document text
    • https://ckd-otto.com/contents//files/92159017471.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160acc85a7a5f4---satugutes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=giardia+merck+veterinary+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

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_off00010eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAC 10652 bytes
SHA-256: 79ace808bf9c5557fdb135f3cee953bf6e75dfdbc985dcdf0e77c4bb7b65fcbb
font_01_sfnt_off0001270b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270B 18172 bytes
SHA-256: d3c44d5bf0346b2460d47e4005f58638e6716bdc763ee4145012ebe7bf1e186f
font_02_sfnt_off00015654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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