Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77b45fafbf141a7…

MALICIOUS

PDF

72.5 KB Created: 2021-09-05 11:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1931671f305380b97275ff122aaeadac SHA-1: c23215b234d066643afc583c64b64e45b470cca2 SHA-256: c77b45fafbf141a7cce3b4fde52a7c316a7035c5179b8da607be9a127faef3bb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://cructi.ru/uplcv?utm_term=le+condensateur+le+dip%C3%B4le+rc+pdf PDF link annotation
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f5dcedea1---tusabetidezeduwul.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/zokiwitetanavumexime.pdfIn PDF document text
    • https://jagominum.com/contents//files/gamado.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/9aeou1pldeo8dh5if11jdgr9pm/ninarilove.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210719_3D62A2AE164979B5.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae6570350---zivogokixovobita.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/74674284120.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/11960642647.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b8a135f62---wowedukesanomeriroxiz.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6639ab72c02ac06c25cf50bc5e17feea/sameta.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/533970188.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/78231450762.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1552b101a025525047772ed43657f8b1/26196297121.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/losamo.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210603_024359.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0034d7f11---84189321260.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/86684062354.pdfIn PDF document text
    • http://guchenes.com/d/files/77089765179.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/31024093919.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f477eda05b---4544864400.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/82511845036.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/64847654991.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d524ce0be4---torexerekugobekuga.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/k0cb13k2a1jta7v583jb00gqh9/lerovoludituvoda.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f1b9a9a36a7df521104aa5eb8fc9ec98/vovufujawiko.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e06cd2d47c8---wuraxofimik.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/tilibojisasedefagerita.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_off0000b9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C0 10816 bytes
SHA-256: 7c42931d7d7f59f1132a1dc59919bbbd6e7656d14b284161ffcd13fc9786bfcc
font_01_sfnt_off0000d28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 15648 bytes
SHA-256: 43d23fb86eb4a277d76a75b19d2c14f7ea61f354ce0e5ac436765dcd71b9f34a

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