Malicious PDF — malware analysis report

Static analysis result for SHA-256 105d4c08b166198d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 00:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b380d7348185a03d97355a78073a7fc3 SHA-1: 2ac2f6f64621143d0e302b0085589368860d1eee SHA-256: 105d4c08b166198de6a27579e5b4fad2d4a858f600112dd6051fbfd99de11429
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites or disposable hosting, likely intended to redirect users to malicious content. The presence of multiple external URIs and the link farm structure suggest an attempt to distribute malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a335b67a19b---46864079647.pdf In PDF document text
    • http://blueyee.com/upload/file/181245127514.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5fd3d579eb6c30b03c20d0b003cba8a8/51216762004.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ce9ea6d03eb8f4a07cc9d1c452e84f8f/36432670022.pdfIn PDF document text
    • http://citranco.com/users/files/58150252340.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/1132813afc9dd5d8040aea9f5847661c/kowagib.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/83683050538.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/sudodarovogasajes.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/cf3e9214f45e90ffdd12c4277bbf8503/zopujuf.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d033e7e721---13716459639.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/pjqpsln0lpeoq32gf15ks1h89b/xegukawoxemiziduzenemireb.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/wekulimikerozojemutexakus.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/ed1a73a281518ab75bc6abdb74c4f483/90289501377.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/aca8d3835ea42a3858ac79e87e2db1e0/24745550931.pdfIn PDF document text
    • http://djapm.com/userfiles/file/muzodabukipasanigov.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823b17e984e---fowuserutinakajapijamezo.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5096ee80f---fabiv.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/lorelo.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/51500609375.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/lrcr9m0proig34va1boft6sjeh/28218997891.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/6c5ca4a7c437deb5397cfc336a77965f/39673650664.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b453134d477---27848667057.pdfIn PDF document text
    • http://licausi.it/userfiles/files/jalebolopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=mother+of+1084+summary+in+englishPDF 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_off0000d275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD275 11328 bytes
SHA-256: af5c3e1f0e608aa57db12910a4514f1b47160287f56d3af13813856946ba8404
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 17364 bytes
SHA-256: 97471e676d5b513b9a6b10daf340f29bd7c1d8ab007c2fe9945d4f2924063ee8
font_02_sfnt_off00011a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.