Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe14e89b8f40285…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 01:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5592f9ea2dd69a3002d66fa39fecfc47 SHA-1: bcf74305836f99d68b6d97a84690d70a55087aff SHA-256: efe14e89b8f4028536c73b6345fdc653a6485b441bf062823b0d5f9ec5af7dfa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135ca1c34d92---35971760388.pdf In PDF document text
    • http://progettogeometra.it/userfiles/files/kafetivusofasesasulaf.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/wibufozu.pdfIn PDF document text
    • http://avon-bratislava.sk/files/files/68632092807.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/jifelumexijogarejibolosug.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16145c8abc9539---mejorubi.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/52378906174.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/jexikivajakogogudiporebu.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/varire.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/42935358245.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138378e2d29d---lofovitobewavepilebeba.pdfIn PDF document text
    • http://veitali.com/upload/files/tidusawu.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161357c4850644---wepagituvozosijar.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315680ddc9d---befevajodenenadogeluxazu.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/82149914792.pdfIn PDF document text
    • http://teraval.cz/res/file/wakudasisunovufusixo.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/resewefenaguwupexa.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/mamof.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/kimomozujuwewuteferona.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/72831284423.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c36da738c---wolujifedegomigunufupudin.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/42760143164.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/kapazad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=features+of+mobile+osPDF 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_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 17508 bytes
SHA-256: 35e57b7bdee2c64cd60d9883b8cb1e51b7601100eebaf7e4aa1a26641e9ff2a3
font_01_sfnt_off000110b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B1 10488 bytes
SHA-256: dd0452d46354645b9c9d6fff98a4a6d923b39c80a1d9b45987b52c1a2b1be11e
font_02_sfnt_off00012890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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