Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08108dd0aee8551…

MALICIOUS

PDF

93.7 KB Created: 2021-10-07 20:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 18c1b153b5714e0dd835fb9fb05da215 SHA-1: 2dbf274aeac2f5e4126989448136b95dd883948b SHA-256: e08108dd0aee8551e78427823f0fefbe2171e9df1d28fad5a33409cd60d1b110
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various URLs, some hosted on compromised CMS platforms and disposable domains. The primary purpose appears to be phishing or redirecting users to malicious content, as evidenced by the numerous embedded URLs and the 'link farm' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://thongthien.vn/upload/files/31123773671.pdf In PDF document text
    • http://yao-cheng.com/uploadfiles/20210928165916.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/wowomifelumobarisoku.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/sokodixororesuleve.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/wejup.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/d5046e47b59136aa6c1f27ae18ffe71c/babemavunikesofunakudowu.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/godajitibatebonuzifi.pdfIn PDF document text
    • https://robertbah.si/files/file/44950272964.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109281320254005.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/9842929088.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/wikamo.pdfIn PDF document text
    • http://djpress.pl/Image/files/zizilexotukekutemisiron.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d1b8bd2fb2080f797aa7a040ab502ab7/limatopuwakaw.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/wudiwosuzaweguduseg.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/838c848ff06452dabd8b047117544800/96481147423.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/zutenifigipajimufukemor.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/53983357906.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/u866uoqmse93uc0sku0r9oaoc6/54964913408.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/2566672845.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/28632931141.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/satiba.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/xelulivavaguwusojaga.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/10350306746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mcq+on+computer+languages+with+answers+for+class+6PDF 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_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 19460 bytes
SHA-256: 17d776f7336e6266508b8dbdd04c071fdec5855aed2eea23af21f725e4c84e72
font_01_sfnt_off00013673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13673 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8A 11420 bytes
SHA-256: 9e0647536ffa2060a919e34654f963f2fa9de938a8d546e7754f3aea5a941387

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