Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf1373f2d27474d…

MALICIOUS

PDF

87.5 KB Created: 2021-09-05 16:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1af2d93800590677a27f34bb2766f8a5 SHA-1: 4a422cc55a7b6d24f200b80339ec5d97ffcaf04d SHA-256: bdf1373f2d27474d4afe39ff74176ab5cfa1ebea325f44e865a9c765c2a56b90
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and links pointing to various domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=information+security+and+it+risk+management+pdf+agrawal PDF link annotation
    • https://davaocarrental.com/images/file/futepamebarisujijakego.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16126b9c912ee6---mejesovogogojututoz.pdfIn PDF document text
    • http://allasclub.com/campannas/file/90828742854.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ubsrd03l16paomgpij9i6h11e9/36479966787.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/l407c9n7eg0ktj8sp2nvddqar7/legokak.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/zabinaje.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/vuzidi.pdfIn PDF document text
    • http://intersonik.eu/upload/files/9545371842.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/pemovojilefuzadewaz.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/vajuvasokiboxipibetu.pdfIn PDF document text
    • http://apvn.info/userfiles/file/68824636689.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d9d6798b0---nanagefi.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/28584b3a50b987c729353d5886bdfc62/86603195849.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/11540646348.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/60655679659.pdfIn PDF document text
    • http://ha-sine.com/d/files/98286865487.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/jepogenetupemulexuni.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/65r2d56rkqhttocn5osmkmgv03/sagelabokamobitorinosezat.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5dffe1b135ddd904eb5f6cd6c22d8769/kokumupexib.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4feaaae67---96770460098.pdfPDF link annotation
    • http://zulaikhatextile.com/userfiles/files/510244201.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706dad8daf9---47352835287.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/8460826295.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609881fe7d6d5---57745669626.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_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 11308 bytes
SHA-256: ec2e68f009fc0bd4e0c75d6764c36c7f580e217871028b08437f061f80f85910
font_01_sfnt_off000108fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 17892 bytes
SHA-256: 39185b9e82793da254ec4bb654ea66338b631eefacb991c17c5a0b0fb4b88f6b
font_02_sfnt_off0001376a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1