Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0d10ecb065ffd4…

MALICIOUS

PDF

81.9 KB Created: 2021-09-20 02:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4caade133e6b3192d0b6a725e514d558 SHA-1: 39d9bd4795606c9b46baa9e224f3ed783c1ed2e3 SHA-256: fd0d10ecb065ffd4c78c0b9e746d621f381b9d04521d4b1fac06b27011ecdb8b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The embedded URLs and link farm structure suggest an attempt to redirect users to malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=dream+league+soccer+download+apk+2019 PDF link annotation
    • http://vinacafe-dalat.com/Images_upload/files/35763258948.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/30311057098.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/nikoxirovolifebodo.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/19354870902.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/21011880161.pdfIn PDF document text
    • https://nada70.org/userfiles/file/tapasolevoj.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/76559258476.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/57957130212.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/78284732680.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/20220465213.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/20219181921175476.pdfIn PDF document text
    • https://jung-yeunjang.ch/userfiles/file/diwudidavuvu.pdfIn PDF document text
    • https://phukienbep.net/media/files/kasijufiluzevuwenuzas.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/jiroxizamogudava.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/vopawefef.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210916_004437_132.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9aefe5ae4---woraruw.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/monosotakexaxamavenufazer.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/wegoluvotelevupurixa.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/29878305923.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/48816254828.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/48927779253.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/ronovesisovu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/1kmlhus1cu0lmrt0qtd1ohjc81/gululopa.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e69a6a89ca---72283688711.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144cfd52e0d3---xiwaverusozoxigarojugu.pdfIn 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_off0000d1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 20356 bytes
SHA-256: 0e2222cd054f16c0c2015b65b6b27ed66ca1f9822a1c69a57ad12ddd1c6620ce
font_02_sfnt_off00011f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F07 11408 bytes
SHA-256: 2dc1c6a038cc10acf9d62caf706fceecb5f796a39e7aab9e7317e7172ad139d3

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