Malicious PDF — malware analysis report

Static analysis result for SHA-256 02dba8f3afbbbfbc…

MALICIOUS

PDF

93.2 KB Created: 2021-08-13 21:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 61d29235a3dbdb47e0c2c4de4f61c6de SHA-1: 5d3147c3105b52908cca83740f0a3c4624345e90 SHA-256: 02dba8f3afbbbfbc5a88f6bf59de06fe6c41643acc89a0e2e92f0c3041b4573a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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://yameitecl.com/ckfinder/userfiles/files/20210710_110211.pdf In PDF document text
    • https://armenia4d.com/contents//files/27384089720.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/15a3cae47c598c0d9d67e821975df354/selurazowaxi.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/titaxawanise.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/62018649839.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ba346162a31ac25016222fbb9a9ed45d/tinutejisizovivomunusak.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/14765226052.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/42877618225.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8bd240075---renasufivol.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/35335616921.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/60212403137.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7822ba831c65d4c7ba612aebc8cf10e0/45153299321.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/756bc03fa673166da521df6657a1a177/94164934531.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/26162612876.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/74775859006.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/wowafiburow.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/02fda8dff2a3234092b36907c8ca3ca3/jisiribi.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/zotebojiwapudulize.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/47692001357.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/50616532811.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/eae29d4e7ca9b25e95d00a9597752f7a/45585895125.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d63fa57d9ed---lakigomidenu.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/mawifakumogofa.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/8db714afacc82d073570d4294c226bc4/52091483982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=no+1+judwaa+the+unbreakable+full+movie+in+hindi+download+480pPDF 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_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 17276 bytes
SHA-256: 51d4892bd5fbcdafd2959867129a2bf0dba6f639b2759b54e6c556ef5901bfd6
font_01_sfnt_off0001325b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325B 11648 bytes
SHA-256: 45fdc8803e7410510a6a5f1fd66cfff701c3d63572ac7a1e923f0483099bdd09
font_02_sfnt_off00014db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1