Malicious PDF — malware analysis report

Static analysis result for SHA-256 774f40e72e0f2e19…

MALICIOUS

PDF

71.3 KB Created: 2021-09-06 11:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0761cd0ba94a6c3b9a1b4a3a57d031da SHA-1: eba61308e9c75fca7fc9574e5035779987dfb343 SHA-256: 774f40e72e0f2e19d840d867368b0c504ba31415d8faacaa766f53e32bc57f8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm used for phishing or malware distribution. The PDF structure and embedded URLs point towards a spearphishing attachment delivery method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=indikasi+alveolektomi+pdf PDF link annotation
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/90861631020.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/74430408804.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/julikol.pdfIn PDF document text
    • https://menu2uplus.com/images/file/bexif.pdfIn PDF document text
    • http://flexa.cz/docs/file/faxugevabozovipe.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/subolelozapajik.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbe0edea570.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/76671974767.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/tufap.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/fibilogi.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/gonevatagudasumafozobetix.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b890849c6951342071ba739370b2fb50/modoxavipona.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f79e03dcc5---52645547764.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/rafuge.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69738952143.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/28387539498.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/66879655936.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8bf6ae319c3f41b011a82e85f9019892/besofetuwuparemiwonepar.pdfIn PDF document text
    • http://hidropro.hu/upload/35543063847.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/5763530609.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90ed4d187a---32610475291.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/72210541525.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/lijojevodegaludenuxumo.pdfIn PDF document text
    • http://vladekoservis.ru/files/83609689791.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB83A 15352 bytes
SHA-256: 31809593eeaeb010dc4f91fb982559086a5c01f9dbd13988e760747f4c1e0c57
font_01_sfnt_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 10668 bytes
SHA-256: 357cfa60b4b47374a87c6bb8f97982df0359e813d3f37faa485a67614acc9d1f
font_02_sfnt_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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