Malicious PDF — malware analysis report

Static analysis result for SHA-256 062f44828e2b630a…

MALICIOUS

PDF

90.3 KB Created: 2021-09-06 10:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3db5e0e10e79203e81587f3c92c12a33 SHA-1: 768adfe1de555bb18b0f880bd1bc1a0afee27a3d SHA-256: 062f44828e2b630a2a12cd3c8a478dc31fa94787c62f1c983e36f587d5a560f4
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous compromised websites, many of which are hosted on disposable domains or compromised CMS uploads. This pattern is indicative of a phishing or malware distribution campaign, aiming to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://cen7dias.es/userfiles/files/xebekezazavukabodila.pdf In PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3f6150eb0---59864178015.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cc53bb16b---nogabebexirepolepego.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d156d32e30---6045401811.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/tadepibomodujak.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/fasixuduxunuvudebidu.pdfIn PDF document text
    • https://majubesar.info/contents//files/votasu.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/nijekumopivilunarawisa.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/vuvebulalokurewipaxe.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/55623196584.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/94e2769481bfe04ad4b7f50234d5ec22/gobudezirajitixebototat.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/tawigopudoxewun.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9b7c67b3980f6999b76c9d43bcf1de59/42128249900.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/gte9ckjpfisurrl15gb089dhft/kukikagudaxefupifuronotog.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/m20mkg64sa8bbm6p72r1mqlgks/58472206531.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/98f3f58f5cb60a0f42bc277f89ef27b3/jadisofupiwexavakewerix.pdfIn PDF document text
    • http://banquat.com/userfiles/files/83332439773.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1df0f284---koboga.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160be267e8afc7---tesitavaj.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210730011702_w7n63r.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/vilegafigoziveko.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/a2ef4164a2b562ca631ebdc12423544e/nujaribegujuroxepiwevekub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=nike+marathon+training+plan+pdfPDF 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_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 10848 bytes
SHA-256: 14b7cb1fe44b83e8fe09e33c55153f9778a403cf00860107d8e66464e725b867
font_01_sfnt_off000113ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FF 18316 bytes
SHA-256: b3b79218e0111d3bed254f75a1a55cc681cb44b0f084690f013eb8dd07437825
font_02_sfnt_off000143e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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