Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7e5033a6fe9fa1…

MALICIOUS

PDF

86.0 KB Created: 2021-09-04 15:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9374ef0102641ea2a816c6720b1c3fff SHA-1: ed4b2e99659bd6dd489eda636eb1be016ad310b6 SHA-256: 7a7e5033a6fe9fa18a6b12c1671fe03b26e54938633d770da4b6a3e57395a75f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains heuristics indicating it's a link farm on disposable hosting and uses urgency lures, along with a visual download button and instructions for a password-protected archive. Embedded JavaScript streams are also present, suggesting a potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 10

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://a-kamen.com/userfiles/file/masariwupepuwuz.pdf In PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/48210649680.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/95067396981.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0b72ed5610320ef0d4a3be3cf4ab732a/mivoxidamawomotuxugeg.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/vujimu.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/mg5sk6jm3sqtb6em80ocg3mca1/bakemojuzizovasifazopib.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a793631cb353c0e370364f9aed842e6c/2336729773.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/k9lnl675ik96667oop2ie8dgm5/88487490032.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/rikuwirisovobepimuk.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/o4j22sqgtjtiofgorb4n8676k8/8059705624.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/fipuvotemoluvob.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/maxujetuxelodemapugi.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/tijibuzewija.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/4179760237.pdfIn PDF document text
    • https://tigapilar.com/upload/files/sudofamoxusoliwupagixerop.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160942d2186eb1---xobakar.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/naninalew.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/jalot.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f22a6dab---sofasakugodelapi.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/69617550577.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/devokopub.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b91aa4989b---39901217805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=3ds+max+2015+shortcuts+pdf+free+downloadPDF 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_off0000e3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 11584 bytes
SHA-256: 369f2c392b657bcee7cfc0a7f515cdaeef361a2dc7001c310787a07e42ff0acf
font_02_sfnt_off00011740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11740 19084 bytes
SHA-256: b13b4c57fa1c35d3703a12d912ce753ec250dc6853bb601c216141acf231e12e

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