Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15097003cc68eca…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 19:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a49f98957487035b8590f14386b9644 SHA-1: 634a711f867b02527ba04fb3fc8926bd85d44b35 SHA-256: c15097003cc68eca18a69cc45718a6f0c88803532c54d1988cbeb28f5807c8e0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous URLs, including those with UTM parameters, suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=pogo+spoof+ios PDF link annotation
    • http://ersenergy.com/UserFiles/file/27457235324.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/72052372133.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/supamoruxelipagamuxap.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b16051c7a1---julomilimevokaramepiduji.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/pedejavifugevororumod.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e200213ddb---zadujejiteropigilinol.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/tadepupitewepe.pdfIn PDF document text
    • http://beta-rc.com/upload/files/7738579737.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/44754625482.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/31245239687.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/gizamunozevokabewetifijam.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/8eebcb754f0c6b18b395539ed8de7717/95947851928.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/19319227408.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/43774795885.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/nupawavatijoxiwol.pdfIn PDF document text
    • http://safarang.com/basefile/files/xibanis.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109061857095060.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210911_BA86B1EEA731AAA3.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/61797782953.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/85213381988.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/tamaxupumabewoke.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/18dc69df18af0b99f63893518cd67dd9/voronafuvide.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210912134835.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/30d5c1d3eacb43d917dc2e8e836454e2/zujibifimukudibejuk.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/75230309285.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_off0000d4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 9892 bytes
SHA-256: 8ffc25fa5f272bd56b03dd4705c24fa689de3200f211f8b2322fa6dfcc7099f0
font_01_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 18528 bytes
SHA-256: 3b438f7733ed78aa5825609edbb687d59aa2bbe2a7f6ba40242a5ec6318089a5

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