Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c14d1d264ae3c19…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 14:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de5545a0a6d3ab60b22f89edd15d8990 SHA-1: c751fb0677d05c35f754fda34cc97baaa90b716f SHA-256: 5c14d1d264ae3c1976f983b60b6220474524da738d788573b6ca2f98479a85eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised WordPress upload directories and other disposable hosting sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://cosplay-expo.it/ckfinder/userfiles/files/jalufibe.pdf In PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/fad495a477b8f3f5d792f53b89fd5e17/49002074226.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c9f0b016adac0ff8508113464fdc3c33/71483608053.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/nefawebuma.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/63610546619.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086d418f1cba---44874100552.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/40186811863.pdfIn PDF document text
    • http://guitarenko.fr/img/files/80483212668.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/96781030070.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fa55b7524---68244044556.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/344ebe0ab91fe3158e2def6a6955b920/gumipadibebesivemuwoludap.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/e75762112f0c234cb6d2aa18a94cba66/pirufegozavelifuwewibega.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/27423983441.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/40078316897.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4784f52882da0abafbdd81c6b56cc5ac/52339288961.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/u00bp0656sm93rs0rscepvk6q4/34232085868.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736d2aeb07c---vikobodedarolobawal.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f63b39877f8408edda04bd7a02c68960/37888790855.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea3cfe5113---jumel.pdfIn PDF document text
    • http://iwishop.hu/file/futugid.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/40782630943.pdfIn PDF document text
    • http://jingtianlawfirm.com/images/uploadfile/files/gajonewibudunotizuza.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/11979738947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=prefix+suffix+english+rules+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_off0000e5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 18696 bytes
SHA-256: 37a95964f8c1c56dbc0e19c8296a3e71bb420ff97e76b6aab673dc4032fd8545
font_01_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 10600 bytes
SHA-256: c6e933154a72f7f21f404de43aae41dd5f61b42c630e67f8ce73e1e73493484e
font_02_sfnt_off00012d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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