Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf59ae4534bf20a…

MALICIOUS

PDF

90.9 KB Created: 2021-08-13 09:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 37110a5c3a3bff946be9b39a9adf68d5 SHA-1: e01e77fe19eccffaa9796599dbee572dc248020a SHA-256: 2cf59ae4534bf20afd8d20a6c28f6d4afceb35deb305ee5128fa5f74f429a176
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicative of a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a URL with a 'utm_term' parameter suggests a potential phishing lure related to 'blockman go mod apk fly hack'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://poorclarescork.ie/images/jonumivakidixamebigu.pdf In PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/91083852464.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/93bq0c9ijnoar57v4t7896ogd2/46921668777.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/71734886df8310f4c2c640e5f27a766d/loraxiviwiso.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/2243307893.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/92608584504.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/32346426693.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160825404353a0---figulimesawetojub.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/nel5r9gatsav2ehub7afcgef15/fafugis.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/widagusadekiwefuxo.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/2e4435532cd34605afef55cd3f74d874/30866695778.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a766f4e219---78443782899.pdfIn PDF document text
    • https://alutat.com/data/file/tonuxaganabojovibi.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/zubat.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3141cf816---dejekulawu.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/vojutirimebonadiw.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/59403483206.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/fularuxozobagalol.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/75144472198.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/14204988165.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/josukip.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210708_160724.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/duvugetanizovixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=blockman+go+mod+apk+fly+hackPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000e50b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE50B 22904 bytes
SHA-256: e2e82062235208a59e6d547bf96008edd039f83bc80e2bbfe5127b98ad5dd352
font_00_sfnt_off0000ccfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E57 10736 bytes
SHA-256: 4f21318c698a8457a75fbad5663fc2c35e90d7ed156e3043b7d9820f0670ae59
font_03_sfnt_off0001269a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 1736 bytes
SHA-256: a970dc50f3fc642965faeb3d6f2817be39c8fee70eb220fb851f6e1b0fd382ad
font_04_sfnt_off00012eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDA 16840 bytes
SHA-256: 1d20a054449860c1dc89e16971d2972ad2869a97e4b4bdd2de7810bc686b5599

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