Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac1ee2b48e9c14b…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 09:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 36e62bdd6b1b2e67f482c7c79a896a4b SHA-1: ca191f41251456e0e004702d909c2f715784930a SHA-256: 1ac1ee2b48e9c14b5b5ac33048223414c0ec15bb1516267fc8af051129721fa7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=dls+2020+money+hack+download PDF link annotation
    • http://canshu.dlzj.net/upload/files/20210914103223130646.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe455c1ae9---20938233654.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/14474195013.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/nadasatunegavarezetinimis.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/wuxonepadebutamimigusum.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/64234286700.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/8186367616.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/64350032265.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/fetavukesusa.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/xoxakiwibikuzoxorilipot.pdfIn PDF document text
    • http://saktigroup.in/uploads/zutogoguvaxegu.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/vewifexenofal.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d075ed924cb2e34517360b701e1d831f/gagemadiwibajiraludef.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e54188a731---96473087771.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/99852287526.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/37302624743.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/29702440948.pdfIn PDF document text
    • https://ekransamara.ru/files/fagoxenevazurowipizivazu.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/jaredisegilolexi.pdfIn PDF document text
    • http://gekon.net/userfiles/file/pitatobuletadufobedup.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/regibazugabovezaridoto.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/dd9ad703b2a0ec2a3afa6fcc17d7302c/wiwupumibe.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/nenerenedajesilijidoveb.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/futebus.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_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 16988 bytes
SHA-256: 551da3ede4bea145a6fc99b0b8eb0161e7e8306d10b1aa116e600894935f8cae
font_01_sfnt_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001246d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246D 10880 bytes
SHA-256: 2b381a66c9878348fe35f7c4079eed4dd1eabc75c92fe0995d4ed5f5d4b08d9c

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