Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcaeff10479e489…

MALICIOUS

PDF

83.1 KB Created: 2021-08-16 21:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 76aba6d642b1866554f3b1d56930f60c SHA-1: 3d46786ae800c4fe4cf67e9acca9e7c179dd2223 SHA-256: 0dcaeff10479e489b9cec0ce6451099492d8522abc882f87eaf3c750ac23fea6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. The embedded JavaScript likely facilitates the redirection or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jncs.kr/page_data/file/20210623144606.pdf In PDF document text
    • https://marblobathware.ph/app/webroot/img/files/38855288373.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/3280073373.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/43219746535.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/8719735e114f20b9c9c153ffd40b70e4/visadexotifavuvuzulenakuw.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/15926449642.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/7b0d9740c757cb1a979f6f309d8a50fd/46523561177.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/4vh0lma739t7in0c0ghprbtsrj/vodirisidalupurigugaj.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/1034876154.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/mukibujoruvefabeje.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/pusalemanedetenipabonuje.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/54beacab65e60060575e8a083dfcd575/zebizofof.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05117be2df---29042661546.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a16b44d79---38991454874.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856d2e897c4---12257566989.pdfIn PDF document text
    • https://activepymes.com/pub/file/70917750628.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210815201526.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fe984cbe6---kurojevujetitadivataj.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/63483671808.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/gubemu.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2b82ef7a5---51482874338.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/79ffa44adacbe8e6bddecf54124cd629/13678672635.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e4253c75a19c3c3fcf3e628760cd20bd/43341197151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=musical.ly+apk+download+for+iosPDF 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_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 10832 bytes
SHA-256: ab0de1985f096893d49f11f15f699781b8894b6b0fa7328f58f0b3f91edbc47d
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 16784 bytes
SHA-256: 53681e439a62d9ab280f28f6125794018f591cbc3ae0c4890aa10d5f10dd346c
font_02_sfnt_off00012725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.