Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a287a2676ae83c…

MALICIOUS

PDF

92.2 KB Created: 2021-07-07 08:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 087efe9f9e256f97234ee82e8fdca4fe SHA-1: e87ed88e989310ed15feb70b9eeda037b4c3a7c0 SHA-256: b1a287a2676ae83cef22855f7e42f362c4a27e9a13da7c5a8f7ba8e38123c38d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to exploit users through indirect means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/2d8b43c066f2eec695fe9fb479f87cb8/43841027340.pdf In PDF document text
    • http://panziofabian.hu/fck_kepek/gopejubesomoninina.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/14888710553.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c675fd9f6d5---sonebimuvigetujadaril.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d281e91c9---48863193397.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/9236b2bf47c1f6807b820e94644b6c97/makoku.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/46210725055.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/27584384361.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb16626f5---65868775162.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160702509e739f---vutenader.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/pmpb99pps38arg0ngm95h6suqr/tenanudilulosazu.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/79441035067.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56045e5524---sakut.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/nteo83i2enkc0jokci1t6h885a5rar3e/77392781782.pdfIn PDF document text
    • https://menu2uplus.com/images/file/87105584867.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/fojutojado.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/5n177a93kjuromfej1ouhpdta4/fagaxebilugagidel.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/baderomekulotumin.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7ff88deb6699b1672e93317bd16cfc63/69120284862.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/25770310359.pdfIn PDF document text
    • https://yellowstonewildlife.com/fiwiloladoxogem.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/sqs77gfpikqvcutvieeiqbd7j9/xezekegufon.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801b8088251---jejiduririjorod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=newton%27s+first+law+of+motion+is+also+calledPDF 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_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 18532 bytes
SHA-256: a6699cf173868cc63b2af0335e59214fc5a3be0ef2ee922eefc13f533d695cd3
font_01_sfnt_off0001326a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A81 10736 bytes
SHA-256: d9c2aa826fbb9feec96f3a4728f51765cfb5c4a65b7923ce9d1161846426ca23

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