Malicious PDF — malware analysis report

Static analysis result for SHA-256 75036112a5a4ceb3…

MALICIOUS

PDF

86.8 KB Created: 2021-09-20 18:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 110f7f3f03ac66b1cf1dc96752623360 SHA-1: d9470fa7a6567e6e5259d994e8a3754043ceae79 SHA-256: 75036112a5a4ceb3e52bf7b200282128be18783785b716440f6f1a26fb1c59b7
156 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://allytemp.ru/uplcv?utm_term=the+walking+dead+season+4+stream PDF link annotation
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d208b420---88078379308.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/20580892399.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/75443232226.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/76200577128.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/52487471479.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/56540506422.pdfIn PDF document text
    • https://owop.challengersports.com/userfiles/files/lodalododowadimededo.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210919090830.pdfIn PDF document text
    • http://rem-proekt.com/f/file/85338632118.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/nazumero.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/34812641423.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021961748289578.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/fotozarenowawefiwoguso.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/ab10c083854c4b4cac6dbe5bc882ea07/72791424428.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/27530446940.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/4cc77024c673fe40d3cdf59b55a8225c/79332762815.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/37146370072.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/giwupobidimip.pdfIn PDF document text
    • http://modern-pro.ru/files/file/40477543801.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8c922eda0---zufagisaxeju.pdfIn PDF document text
    • http://iscelenie.info/files/file/97818857915.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/xoveboxuwowa.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/40192628006.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/58840582617.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/83932481107.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_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 18716 bytes
SHA-256: 78ebee2db4f26dd827926cd73e8142f7d2754e1b1e7a6d8f7eb16e8263365572
font_01_sfnt_off00011c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13490 10912 bytes
SHA-256: 01222609aa77ca9052bb5f2802d5db92241ef752d15a298d82ce0d4f0853b9d1

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