Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc33d2bb6297f99…

MALICIOUS

PDF

83.8 KB Created: 2021-06-17 13:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5fcc51da9af70d433832a9b2420790f2 SHA-1: 2338ee9c03629f04c6fac8cb0a016acee8d7f25f SHA-256: 7fc33d2bb6297f997e48772f605c875c009f6a482612fead5f14efc270599ecc
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites, disguised as search results for song downloads. The heuristics indicate a link farm hosted on disposable or compromised domains, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://staractivecollection.com/resimler/site/files/32072534165.pdf In PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/70cb58b2abf47b777c3337f7157538f0/rodugidipuxisupozis.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/lerefixutobofuzadukose.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cceaa6d8c5---texagitogewarakupozesifan.pdfIn PDF document text
    • http://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/fuxalufobafivimik.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607287c575f9b---puwanej.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/c4776d4b3bf2a961aafa8407d819bdf2/juvobabubetowezunuvimiwa.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbe5f50f31---mivemuf.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/35747599624.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16085091764a6d---fusorunijufupewewapun.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/pilupalobosazaraxomis.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b391d7b4627---tozemujusonumak.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/5c44c85e352c3a52327b29b9f0e3c951/93174373891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ilayaraja+hits+tamil+songs+mp3+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 5744 bytes
SHA-256: 88107ccd8c2639435adb558dc4e4bff53c6b1fba893f9e6e735947489e1a3b76
font_01_sfnt_off00011ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA7 11176 bytes
SHA-256: 023867dac707190caec6875b61c06ba31ff99675bb7927b00e2da75bbe804854

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