Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9047cde96050138…

MALICIOUS

PDF

83.8 KB Created: 2021-09-01 10:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 1058ff30c79c82421a855619d67ae1b5 SHA-1: 486c92849386051a4a57122af9413116a7943ca3 SHA-256: d9047cde9605013860c506b9e9311d14c1d4e810bb68f2d98d933aaa7d941f98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec96ece11---82438737827.pdf In PDF document text
    • http://builderall.info/userfiles/file/66893247567.pdfIn PDF document text
    • http://soles2walk.cz/data/file/29595656680.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/gikunokofatigesan.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094eb9001770---punelajimok.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/b2bc9b608183da5bee75fdf2eaca25e2/6463055208.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/bepogebegapak.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/78942156942.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///87215993254.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/nezuxefuzofiruvobum.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vonavikuk.pdfIn PDF document text
    • http://huiking.cn/uploads/file/250919224568.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/lirisojozofidafomuvo.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/78959777612.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2mlgcvl3ogvb706rgh5nidb1m4/36228258129.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1c52abefd9f3b37d35c51a44670386ae/navajexe.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/dojafafajimorizowewexivas.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/nazaluxonomefakisure.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/d2ac17d6b9d471d46b7f4e2ccc7b7d14/duvupodevig.pdfIn PDF document text
    • http://rayer.cn/d/files/29401145868.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b783e1f0c5f---96011077610.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/julusabemekuboveg.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/mixapozo.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/mawulatofolotomekibanaj.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/8841532003.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e85ea7c1761---fanupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=bind+the+strong+man+in+the+biblePDF 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_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 18232 bytes
SHA-256: 9feca8ce63a4397341f0c58294e6910804a38d0dc9c2ad5168c6f39c0fb72220
font_01_sfnt_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 10888 bytes
SHA-256: fb1dd2258aceba45e0fe173d1f13f46b7e23606b0bdb016e9c88c49579073332
font_02_sfnt_off000128cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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