Malicious PDF — malware analysis report

Static analysis result for SHA-256 34318f9beed52d47…

MALICIOUS

PDF

85.6 KB Created: 2021-09-03 11:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23f697659780b2edec23c9ded553a4c5 SHA-1: 624ab6a3c83cdfa0e493cac1fedf4753d5fc7393 SHA-256: 34318f9beed52d47eb849e0d34434f3c42eb35e606011980c135efedd20bef61
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c929f3a2bfa---53302884969.pdf PDF link annotation
    • https://turismo-galicia.es/ckfinder/userfiles/files/71258472875.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842aa4120b3---24327611657.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/85778561352.pdfIn PDF document text
    • https://argumentua.com/i/file/36811053699.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/19000357858.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/37932227915.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac568ce31eb---74525118681.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16070024598f28---sowarafisowudodekesosat.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/20919468872.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/49302611323.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/vuxovez.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f4ddc8909---92504585013.pdfIn PDF document text
    • https://susta.vn/userfiles/file/65895797858.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/mizejumevuzuponilatopo.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/0266b0f779a5ca7d78a5819c292ee287/46881006050.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1c956f722329e956954d9ac47cbaee86/pagujawipe.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74501c1878---87292060217.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/xadekalexegurafotomulemov.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161184957aeddc---virogovilisofew.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/tafesalizobosi.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ik38tti70is78uat4g1o0k527u/bijotapob.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/339f2e035ad2f26d5e2ba9ec95034da2/kulatilumikesaloro.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b17b35ac1---dufezifad.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/70277175065.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=interaction+of+color+50th+anniversary+edition+pdfPDF 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_off0000e475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 19072 bytes
SHA-256: e0adf65f13f584dab828c8ea2f6c74b0f58412b92bcecd29e28c9beed2b761de
font_01_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 11104 bytes
SHA-256: 094e9737aee947fa78fa2483e76b72a810bb9ba9508129c37b74de3c88c03e49
font_02_sfnt_off00013020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1