Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1095ff43f1932c7…

MALICIOUS

PDF

81.5 KB Created: 2021-09-01 12:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 04f2c8574ae936738dcd02263731f95a SHA-1: 044c693e8172253229697c3e4955d0a80284d4e2 SHA-256: f1095ff43f1932c7cee21fc662e3cb277d23733ccf999544a6e3110c63efd22b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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=how+to+get+pokemon+ultra+sun+on+pc PDF link annotation
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608eb691dae70---67799647408.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f033d995---76890921730.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/kevatevo.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/11444325238.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/0a4967acd910e5b04320dd9a4bbf952a/jazixe.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f97a948107---furejozowejuwibifogoxene.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b34a9314c12d2849044ebe045d8968ac/kitinedebimo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/3920c4b974e9971c852d43246252911e/12804848534.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/febolesupekedasanikilama.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/wefogafibedokutinu.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/67871515252.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/48676930007.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/togosunuwuk.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/96075191649.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096df8fb975d---6592346538.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/6164819604.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/2cd6633a0f50d3108614df6ff5332f7d/56826509533.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/wurozapuseju.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/rivowigoposatogurifu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bq14oklocn29gbtl2nmgqrqcs2/21990527785.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3defef2b06---22199788814.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/noxezodemen.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/99355740920.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/bcf188a8d6da020be9808124e203cd47/lotirizubawexojavopivos.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/bojosamode.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e009b258680---sawugim.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_off0000d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD588 10896 bytes
SHA-256: 720782fe55c926fdb57ef9e5d4e2ce7abdc6972435b666e1da07c3d8570d55f3
font_01_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 18540 bytes
SHA-256: 6ae1b85453fe6c3702961cde3e058ba5b9619673a21049e6883f94796d2c5f7c

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