Malicious PDF — malware analysis report

Static analysis result for SHA-256 1418bfd1a45de5a2…

MALICIOUS

PDF

81.2 KB Created: 2021-09-15 11:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 26c273bf43eedd40445bbf2fdad16272 SHA-1: 6848e571196b03280b8c0ed936bc8234ed361fe6 SHA-256: 1418bfd1a45de5a27336492480a721ba79484d4d4e6132b3048988727e96b7e8
196 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple domains, some of which appear to be compromised or disposable, 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 0.9955

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 http://farmandari-sarvestan.ir/images/news/files/63409714225.pdf In PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e97ea17d5---5285729143.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613173146fac5---dabej.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210902012342.pdfIn PDF document text
    • http://grabnerestriche.at/degabemunisolilepez.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/25365353098.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/jiwobilibalexad.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16138a6a563915---sebozapef.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/47831353990.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/lajiladamivad.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/jofibufizobi.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/63012399191.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/donedidotolulafazip.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/4280815090.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gejifagosonebiximusole.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/jutotepuwumifokike.pdfIn PDF document text
    • https://people11people.gr/uploads/File/ditaxirosoborobal.pdfIn PDF document text
    • http://change4best.ru/upload/file/65275849745.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/lewesufutesusikub.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/17628668176.pdfIn PDF document text
    • https://coevent.ru/upload/files/81786188809.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/tetefekobutipevisokuz.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/9983762414.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/tatujuxenunijanufise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=file+encryption+software+for+androidPDF 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_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 17392 bytes
SHA-256: 4626b65c2a2d94bdba002f163aab09bfcb3ec3c99576f2214624a906f29b136e
font_01_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 10792 bytes
SHA-256: dc1f9ce44853f20b6bd8440e0885c19e7a05149586c450558013559c4e5a7140
font_02_sfnt_off00011f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1