Malicious PDF — malware analysis report

Static analysis result for SHA-256 deceddab91709ac3…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 22:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 545676e44031af3c68cf0b9a0111db42 SHA-1: 2d5828a5567ef581952d8799d5a9d56bbe8a57e7 SHA-256: deceddab91709ac3b53271273403c22d3624da897c5456d76d9d4af10a48fbdd
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, aiming to trick users into downloading a game. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9242db2b3---vimifubujeb.pdf In PDF document text
    • https://tahubunting1.com/contents/files/sudepazuwo.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/zuzovisub.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16137a98b79f57---vafamepotaru.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/50765303341.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/42616407739.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/nejejobaso.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/tigunavasutit.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c74b26511---mupiwedinemuzafave.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/pakawesumapizesifobik.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/biwukorenavu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395552d92a1---87486316952.pdfIn PDF document text
    • http://davobio.com/upload/files/70945368270.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/bec997e3b47c397f81474dd82b77c268/97139832635.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/94846762402.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/84454356807.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/jugogaguzitavare.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135139832cc6---37931240790.pdfIn PDF document text
    • http://sbairs.com/datas/files/zijokotivixamij.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/36492379826.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305b0f3edc5---jekobegogifelug.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/gofinupojuki.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/232234010.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613364c4ee75b---38832923084.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/lakesapusateket.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/tibilop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=download+game+stickman+rope+hero+2+mod+apkPDF 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_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 17904 bytes
SHA-256: 5d235b94d8078668cba5104277bb4f314d075575ffb5a4c975c426e11d431190
font_01_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12103 11260 bytes
SHA-256: b58ff3216ada9500a57e409efb079264b2d5c84a4b6684b7a2305ecd9675fd41