Malicious PDF — malware analysis report

Static analysis result for SHA-256 4057c6ca6e0013ee…

MALICIOUS

PDF

89.8 KB Created: 2021-09-05 15:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1e1ad3705431bcda779a9321d43cbbe2 SHA-1: ae2d5b0f5f7a810c93e6112a8650c3c043e0a66e SHA-256: 4057c6ca6e0013eed862e9ee52f3168ac9ae80e58af1523aa47ebd69e1012382
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/pojr632hsv6c7apalebf8r4gcbbb4n1a/jubop.pdf In PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e017f07688---gupofolutigafebobokuxotiz.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/rafesamowafufo.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/42803788295.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/34372410426.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/jidovesokudumifuwaxov.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/gvg9hg5vktrj5fh7mg5nl5s3p4/50500831211.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/taripulipinejafe.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/zubiwolozibodop.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/14661793462.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/peberasuzogopopeb.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/goxosexini.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607de5d47cd54---wonol.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086064ab95af---94156789755.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/d7c6ed63ec2a63057f89ec99a880a512/37567786052.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e43a444ad9c---31459586132.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/71552914818.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/gimevukusogapedepelozutas.pdfIn PDF document text
    • http://princeverma.in/uploads/files/renatekudavuzuveli.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/17596720292.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef6d59710---vivizixipodeluze.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/gujitede.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/97347904095.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=total+water+soluble+salts+in+soil+determination+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_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 18880 bytes
SHA-256: 50fb438f9fafa621db17371f194ac06aeac059375846ddf8775690fc2c5610da
font_01_sfnt_off000127bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BC 10948 bytes
SHA-256: d9eecfcb2d459caf255b3018164d1a7102bb2e9daab255ef345e9ed9da9b3eb1
font_02_sfnt_off000140ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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