Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce69242f6be9208d…

MALICIOUS

PDF

74.0 KB Created: 2021-09-19 14:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcb015a930c16644e6873b80c0f1509a SHA-1: 241d79303dd28ef6ba3cdf410c4417fcbc8f607a SHA-256: ce69242f6be9208d7ecefb1e5af4495974ad7e4aee012a435b7737b66a5e5aad
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it functions as a link farm. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into clicking malicious links by impersonating financial transaction changes. Multiple URLs extracted from the document, including those hosted on compromised CMS platforms, likely serve as the redirection points for this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://irlanc.ru/uplcv?utm_term=install+latest+android+on+old+phone
    • http://vtvxm.vn/userfiles/file/wuxaxegetof.pdf
    • http://www.huescalamagiaenfotos.com/userfiles/files/vukewe.pdf
    • http://tolaniprojects.com/userfiles/file/paponipizujamemukudagu.pdf
    • http://vejwun.cz/images/78398958423.pdf
    • https://dialogueinpraxis.net/files/docs/karofasovire.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2cff14c71---zupalebimaxelemejos.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b8a14bcdb---danifunimubaguvigarere.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fatujuvusov.pdf
    • http://bestorkate.com/uploads/ckeditor/files/demarususuroruxusikifev.pdf
    • http://fapannimario.it/userfiles/files/jerilutij.pdf
    • http://jenistudio.com/upload/FCK/file/lupinovizapofogugobiwumab.pdf
    • http://bnblspecialities.com/userfiles/files/31871795945.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/98e1f6c95d3adef0d5162bf2dc5690a1/kopebixenanejeleropatokiz.pdf
    • https://hongmao.tw/uploads/files/202109181816002242.pdf
    • http://boldino-hotel.com/ckfinder/userfiles/files/wofedokabadofomiginowuras.pdf
    • http://around-sicily.net/userfiles/file/majidesopomeju.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/863dbc41786bf0b4cf09c840374596ab/59444364488.pdf
    • http://okzawidow.pl/img/upload/files/vazovesuzopesun.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136997006422---71891003924.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b2ec3b151113870319d6edf3ba9a79b8/30593785860.pdf
    • http://rklatex.com/userfiles/file/jajevifetafafaran.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/a9c535ddf1b3d0d8ba3d05efd97cacd5/zofubaka.pdf
    • https://bepcongnghiepphuchung.vn/userfiles/file/31678830475.pdf
    • https://easyown.ddproperty.com/datas/files/22956838163.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf55.bin
eb41ca166b0ba5e6005bf8f38cf31b7e7fc2008a7db6faf6b40686cbc87d32d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF55 10440 bytes
font_01_sfnt_off0000d6e2.bin
c89047f67529c1b6add038956dc4123fff68e5c7ca2a6c09856ab1102c45f635
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 16632 bytes
font_02_sfnt_off00010208.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 16792 bytes