Malicious PDF — malware analysis report

Static analysis result for SHA-256 da112bbf368b0dd8…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 18:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 75759d1582c70fad996f63ec64f5a647 SHA-1: b6fe5227a6567a79c31c3de0d53f3bfd60d49820 SHA-256: da112bbf368b0dd8929d459400bfd0bba5373e15371d05ddc135fed6b191b3fc
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to compromised CMS uploads and disposable hosting. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://4els.ru/uploads/images/files/reremedatubodifo.pdf In PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078d69ac70a0---40197952098.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/cb1f9df0262bc9709e54b78dd6a912b0/68979020894.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/mesapasaxifegapovuwopeduv.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/6395407431.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/t25dgu253kt116aj8pu6f5pnou/88758141117.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/pavogekipedon.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/695rgivvbptijbuvflnc56l138/47662248892.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/0717302d646032f4229e7ffbd40c1de8/joleteje.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/sogemeretenakasog.pdfIn PDF document text
    • http://huntland.hu/upload/file/73595470086.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/39f321f545ed17821796b97b2af3ac99/879093612.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/6474294041.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202108141101314695.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/mudar.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/74693036731.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/xodajobokumakoxiput.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/fesitipaniw.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/37bb79b597c73473f07f3b2f4c802d3b/tojib.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dcb95fb78---36957427060.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/93040070645.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/nuxamatixu.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/fovugapili.pdfIn PDF document text
    • http://cosyromania.com/media/file/vakilaninaduviteziw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=parallelogram+worksheet+6.2+answersPDF 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_off0000c30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 17728 bytes
SHA-256: 130a9e778db773a770a0c0f3a9d8ebb6513a420b6bc7863ec2a6531234d9a729
font_02_sfnt_off0001092b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 10996 bytes
SHA-256: 7fb0af1315dcbf7c0e9fb46d7872d5d20e9e19e6c8573f862f65259b194d59db

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