Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87d1b1e7fb17107…

MALICIOUS

PDF

94.0 KB Created: 2021-09-24 01:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 43266fb0dc7345e616fe1069d8420916 SHA-1: 9ed6cc91093759a4397e601bd5cb260d2986686e SHA-256: f87d1b1e7fb171076617b0b537847c4aba6c4b11dfc0af81dfba199488f39476
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, a common tactic for phishing or credential harvesting. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the intent is to trick users into believing there are new or changed banking instructions, a hallmark of business email compromise scams. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pmrs.ps/userfiles/file/levalisotoba.pdf In PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cd4f107bc0---xewuzowawokinu.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/nelokuxilibarugoge.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/19010979557.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/418059224.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16144b5c58fd3f---dodetidolixuxazaximi.pdfIn PDF document text
    • http://symbolfoods.com/files/file///latafelefokugutore.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/170552446791.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/lamugelarorekoketiri.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/19209050252.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/pomawefutarelujijumitit.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/nuraxeburuwukuzum.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/fubekexiw.pdfIn PDF document text
    • http://gr-chem.com/upload/files/fojevis.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/48358385535.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/limavofibapajudugaji.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/16146826748.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/pufubuvutodosalavamatad.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/tewuj.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/jenatugunapubepamaridub.pdfIn PDF document text
    • http://xn--80aaa6aachkjln0qra.xn--p1ai/ckfinder/userfiles/files/xibitufazoru.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/2q6a3g9n5fcchovchkmrs7noaa/dupawejuj.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614169333bc89---20413324902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+upgrade+lg+android+phonePDF 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_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 10680 bytes
SHA-256: 50a8b2fb37482bb0e926aa2c9f2275af62f0184de928ed0e6cb09e9591020c97
font_01_sfnt_off00012245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12245 18196 bytes
SHA-256: 70c48fc2e8275e180c9eb8cecb94d78c67e9d86f519e7f405469ff8d2214127a
font_02_sfnt_off000151cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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