Malicious PDF — malware analysis report

Static analysis result for SHA-256 332efbddfd22e0ce…

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 18:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e40a3310e6e5d46488ac158ead847d17 SHA-1: cd1c5237f9558df2d568bb25cb3e8f2ccb345ffd SHA-256: 332efbddfd22e0ce1062db5bd235d10c302194b2f66a3fe6f1e9a3d162329157
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://crewmak.ru/uplcv?utm_term=watch+the+matrix+online+free+hd PDF link annotation
    • http://didopack.com/files/maxofudulutafaroladejug.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/mesavewe.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/78380217655.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/14128961188.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/62111733716.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/vebenemeboz.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/83035668726.pdfIn PDF document text
    • http://insei.eu/userfiles/files/rexalesixovuguletinuli.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/91906c1600b3f07b33c2179c087ab701/teremuzofizawixowe.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/kidas.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/nirewopav.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/patowi.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-18/20210918155747122997.pdfIn PDF document text
    • http://grimastone.ru/files/zajurerefugavumuviwetizis.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/63525135313.pdfIn PDF document text
    • http://mfcpavpos.ru/file/49739140961.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/06/69515647198.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/sufixuzila.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca2f1e55dd---sadek.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/dufijesam.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138c57e8dbd2---gipazovuxugafemunenanozob.pdfIn PDF document text
    • https://webmanagement.colortown.ro/images/file/tupopuje.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • 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_off0000b167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB167 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 15376 bytes
SHA-256: bcc4137f1984fe97d58103f4ed7e4bf35d9e707f2a533302424d7fcc329372da
font_02_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 10668 bytes
SHA-256: 7a3785a8b245f21120c91620a9df291581b4ea3767d6e7c27bd619cc8c78fa40