Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11cf5a757a964c7…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 13:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c1a542c4105413a8c378d4a2e953ae52 SHA-1: 806b4f1c487b4df12fe25970fbbdd9a46c85ad33 SHA-256: d11cf5a757a964c7de9be126020abf0e97dd81f3d9aa327a3c8776a0a783cad9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on disposable infrastructure or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a common tactic of using link farms to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://airelimpio.mx/img/editor/file/12145265353.pdf In PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a5edfa51---pezenipujulegoxupaxovowi.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/91475262861.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/7077225992cab75a65d6b488da9e72c4/29508001901.pdfIn PDF document text
    • http://aimic.com/userfiles/file/sidotifirinuxasus.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/96630340123.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-5/20210705232748645153.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/65187331143.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2da985e4e---69969126515.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed124ff3d1a---vulejoku.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/7673034147.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/14967971919.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/pikasu.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/26669789052.pdfIn PDF document text
    • http://lawyergz.net//uploadfile/files/modakilafijemoxolari.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d16285c95---3511348923.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/fdb6e322532e94ad197f398aa1134085/66890025094.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/zukimosul.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/30198089212.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aaad594d2b4---53314178830.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/81751287684.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210607070917510.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/1vkv0l3cuu5i3vtv0e8ugtughg/gozafiwuvejif.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/fevukadaxejaga.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d954bf49f---48938232549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+4th+geneva+convention+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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 17676 bytes
SHA-256: d1bb3bd28a0d8b2917da4755a5629e59ae28d5be784e70cef822542ec8ae3dee
font_02_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 10692 bytes
SHA-256: cca4424e2a202ca811b9b724d149198faf2e8b76b041d2a86492042eebe30877

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