Malicious PDF — malware analysis report

Static analysis result for SHA-256 0698f7c5ca3902ee…

MALICIOUS

PDF

80.8 KB Created: 2021-09-06 06:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4558e334de2dcc8a6913a6296e4a3c9b SHA-1: 6bd3309535af1987913c6d838363bc269d9c2c85 SHA-256: 0698f7c5ca3902ee3b6ee9e9b31e4cd1ece287e65278246ead062f8894e70395
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure of the PDF itself is designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/896235de6e512a792232f90c3e90a9ca/96536233263.pdf In PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc7b9f7ac---86975153392.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/h6o5cusdsbtcnvh8tqus23lju0/38183968035.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/e906af99d568bbc1de4f5ea93e80b55a/80968092904.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/6t85dcnoq6rgfi9u9m6epg0tbo/furunesiwo.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210613_FA8536C0B4CB0ACD.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798b9123029---zimukikiruzasipilu.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/34792450514.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a311019d1cc---31763615388.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/78281440034.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/5316351172.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/qf6cbc611melifmvuqjvvjogdj/wadikirotuwuxasefala.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086faa871123---puzomaxotowu.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/levijozizam.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c582c9f28a---75575212775.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/feruvad.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c80206251---36856531631.pdfIn PDF document text
    • https://cncunse.com/d/files/60414005784.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/59781974077.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/46uc047216rl449qf2r30hm4ag/rarisiwerebe.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/38242830461.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/u6uk7df1hdubql2lh7njokhl13/97606783202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=spss+24+manualPDF 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_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 10244 bytes
SHA-256: 84845e38553697b014fe0101665685620886515f5b1ca3eb1fc7ab1e854e3d71
font_01_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 17832 bytes
SHA-256: 2e0708f4833d6f238c6702a9c03e366e0072ffb77503a234ae4241943b3fd32b

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