Malicious PDF — malware analysis report

Static analysis result for SHA-256 2613ebfb87526b7e…

MALICIOUS

PDF

99.4 KB Created: 2021-07-06 19:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fa7c527e5bb0dde45b8ddcedebb504b2 SHA-1: 298970fa264fb365434ba02b06319fcd3c4bb655 SHA-256: 2613ebfb87526b7e77c981810520fb6fbc4bd3df516fa370367eabec5a7babd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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://huntic.ru/uplcv?utm_term=new+house+opening+wishes PDF link annotation
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a1a448a19---pugokedetulasuluf.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/95131070811.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081291072e3c---36522087632.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab5aa63244---sivegaz.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/sekaj.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/2b6dcfe54115d03dd861a78fe758aa85/77026243372.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b51c5766b---vofakogur.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db1629b0ab---kokipilizegoviw.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080e73b6e868---68440189108.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0655b548b8---nelowabupalikis.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/76bb6330839dc5babfef4b0491cc23a8/kexawugavuzise.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/20362472382.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/siwuxi.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/gasexesuzagonej.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/1fu0r8i1i2hmbt2drr5h9u9jr3/tasekujemoxabilosefeba.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab314b8cd1---99528913276.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608454dce00df---60011433007.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d56a4d0a6db---bovedojod.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1625428586_19a43c85a3.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/82f38d622b42a708520095bfa006716a/98169908726.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d76cd9f1a95953a25dd66b64e90ab031/jolezanibuvopedikifavefa.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b484de761fc2b08c502b16a761a9ca5c/88841839325.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160da0355ed220---93517794016.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/bunezomotaraw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCC 17312 bytes
SHA-256: 2dd6efb361aa39e6e2b9518f5b122c7501c5db9fbe1a6044d0f92d46e3dd2c2a
font_01_sfnt_off00013a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A90 16340 bytes
SHA-256: 88a5f3ad9079b2340172ecd64f1cd79ba1ad1753eb2b73e58de10c5a7be67d15
font_02_sfnt_off00015087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001689e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1689E 10288 bytes
SHA-256: dc1488c44b227151ad811564dc67d5c2732039dda0831e64f0cddc113015b607

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