Malicious PDF — malware analysis report

Static analysis result for SHA-256 10572cd76ecb21b0…

MALICIOUS

PDF

83.2 KB Created: 2021-07-10 01:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ee271573d9d7925c22aba89858c7fb8 SHA-1: 5a205ec79c550ad86652c03fb59f82d45605ce68 SHA-256: 10572cd76ecb21b082631a9bdb43074191fea7ebf7ea36608eb83e573d4ab161
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a payment redirection lure and a link farm pointing to compromised WordPress sites. The ML classifier also assigned a high probability of maliciousness. The document's content, though heavily obfuscated, suggests a lure related to financial transactions, likely aiming to trick the user into clicking embedded links to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://rrr71.ru/upload_picture/kinupetevupabatonojunomok.pdf
    • http://aldo-ins.com/userfiles/file/35319173555.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/659682528e046dc5c661a492843d572e/59914471122.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/ca79630752b1d0937040246231aa3d9b/60879583520.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a92001b0d58---tepozisikini.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c7e9d8486---74399052433.pdf
    • https://vipbeachhouse.com/uploads/editor/file/majuzefubebu.pdf
    • https://vongtaytramhuong.vn/upload/files/gabemapotebujurefatozi.pdf
    • http://beergolfers.com/blog/images/file/21028703456.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d54bc93384c---25642177599.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/dktmvfjmrtav0vlao18r5dka75/jekevurukigepod.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/39c71059875116286a38156ce42d2e2a/folubonowosimivonolewafan.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e0lta0t8163m98ak233qfdpmcl/kibosajijelulitodepugu.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/62udqmskfr4s6hvoggadcjivm0/13190182972.pdf
    • http://xdata.pl/app/webroot/img/ckf/files/kuriwifozujabonunuxija.pdf
    • http://tai-yang.tw/taiyang/upload/file/57639028615.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/844b89ece616c67a92388998117806c6/53793622730.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/gl6un97ag9bmssm27tlo3p5cos/23491097536.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/f04uoiin23td0cuc1t1h1ppcu5/guzazisebijodazefaxokovu.pdf
    • https://louvre.lv/res/wysiwyg/file/vonosanonojanebogomofelul.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae4ed4373a---99908801666.pdf
    • http://0851gay.org/userfiles/202106file/2021062522483570554.pdf
    • http://zap-interactive.com/uploads/files/92142850161.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ja47nce5qk8fdlpr6s180lvdt1/95227526854.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=60+day+indirect+rollover
    • 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_off0000e3fc.bin
e9c0fdfb59d5ded6bb66398503a4e99e3553cf8ae97fe05ff8ff39a7b15d2ba9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 10568 bytes
font_01_sfnt_off0000fc32.bin
750bb56e02eaf9db11898d5787121f49fd73d57e79b004f81b1ffbf7522d2c39
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 16688 bytes
font_02_sfnt_off00012792.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12792 16792 bytes