Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65ee9089ab3ddf8…

MALICIOUS

PDF

92.9 KB Created: 2021-07-29 18:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 03b76f96e822407a3180bb92a2c148f8 SHA-1: 568e94a5db08338650aadc263c95bdb4a3dfdbc6 SHA-256: b65ee9089ab3ddf804a4ad22716426fdbf5d59f1974b37ae99970ccfe366497d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to potentially compromised WordPress sites and disposable hosting. The embedded URLs suggest an attempt to direct users to external, malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/4760343457.pdf In PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/boeu8i1us55qn6thk5ji309v31/fulevovovedibobuposavew.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/7736022285.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/87100999018.pdfIn PDF document text
    • http://mayamalay.com/clients/874202/File/26765858122.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/50529242600.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/vomakulameni.pdfIn PDF document text
    • https://mmszke.hu/files/file/52976186655.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/purudatasil.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/81655344213.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/sigoxepijolimu.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/33351394712.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/71578389581.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/kabalipap.pdfIn PDF document text
    • https://chptravel.ir/data/file/26234512243.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/53212960930.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/kevodupegu.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210518230414.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094936c404db---54761751969.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/l8modggq450hvcfkntc7tspf60/rirekugatorevepekakiraji.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/64022866190.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/vasiwutezebefilivopesuzo.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/wekigif.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/18227082184.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610290b75ce7b---xosepeduxegisew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=dihybrid+crosses+practice+problems+answer+key+dobbyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 11212 bytes
SHA-256: 9ed66ea2bf62634cc226bea51ff73a823c52d0d73929f4b42cfbd470d4acd826
font_01_sfnt_off000108b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 17492 bytes
SHA-256: 42be3fb5925fc4c893dcb970a2fa0da9f5174ea0bedf64a65b275efb6d2283ad
font_02_sfnt_off00013698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13698 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off00014c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1