Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bda6318d00ee7b9…

MALICIOUS

PDF

81.3 KB Created: 2021-06-28 23:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2720a3159f71eab3b4fc128d26d7d2b SHA-1: 904f2a8246ff8afb22f3150a4021f216bf36e5f7 SHA-256: 1bda6318d00ee7b9d470933305b2512f299f7f5b4bdd0694930c207e9f326e56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=free+pdf+to+cad+converter PDF link annotation
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0ed3bcb3c06f57edfe579f0c8b2145b6/8486370506.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7d524b3f7---febeteja.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090295e6ef91---73408060220.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210605230844192.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/14010460102.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b4bc7a034ad4d37553bef9ac55fcec65/jujokenevozitevuguno.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089b63b644f5---kaxikoludiponodexikaka.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/9c06570ca324bbb8f61efce600e3b074/tamimamelibuvab.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca17c326d---18715069726.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6b63c504c84ad88e6c502008c30fce87/fetegejepovifawukale.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/59611410437.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/fususuvajenajigus.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/serawalibefegeboxo.pdfIn PDF document text
    • http://dytac.hk/userfiles/26620985013.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cdaa589b5---63172974434.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/88426701804.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b81a3e82b0f---15383356915.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075329880a9f---boluponodalorawu.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/314c297p09db37k6mc1failiqq/61567002358.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/puliderimex.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/vufaxafajelupigizevo.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/48080541590.pdfIn PDF document text
    • http://mopron.ru/upload/files/wabegatoveme.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 10352 bytes
SHA-256: c1dda817c72c51078548111be86c41b3601418c118b62b63ffdf31843ef54a2c
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 1884 bytes
SHA-256: 1a02648605b077effbb842b083c66b0e466b44db270e1c986184627c8f77afd9
font_03_sfnt_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 16720 bytes
SHA-256: 93303309040e2f3ba5943b12fe0fe4434b6366fd031d22dc7847d1cfab168bf2

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