Malicious PDF — malware analysis report

Static analysis result for SHA-256 367f05286d8f487c…

MALICIOUS

PDF

67.8 KB Created: 2021-09-25 06:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2e88af95dc70f874962371efa43ea3d7 SHA-1: 0e7c5364878c4663eee7f7c5e2fb435a2b172d23 SHA-256: 367f05286d8f487c18a291bf768f4507e5ff737411a9e2a1a37b6bed7fed3221
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded links. The heuristic 'PDF_IMAGE_LURE' indicates it's designed to trick users into clicking a link, likely to a malicious site. Multiple URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://wastran.ru/uplcv?utm_term=jogos+hack+n+slash+para+android PDF link annotation
    • http://congtrinhnhaviet.vn/upload/files/71997267309.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161315d930b52e---65337877795.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/domagixuve.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/99477641658.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/5237f0bd2cc8c6e5797c0033ecf5ea27/dozefadabulidemadivid.pdfIn PDF document text
    • https://jurad.eu/files/file/zifobeke.pdfIn PDF document text
    • http://geodez.com/pliki/file/mifonizalosad.pdfIn PDF document text
    • http://klinok-saintp.ru/files/60640596308.pdfIn PDF document text
    • http://xindeshiye.com/uploadfile/file///2021091208002725.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/nareze.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/dipuwuxikaberunureluwawov.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/76292521990.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/tabojofolutaxumekitiw.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/riwubobuwodulo.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/tomumizibejodefamedivitir.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/35543077468.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/26918256506.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210910102053.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/lugimule.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/48929677431.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/1300604783.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/3db966733671e5204e1d3c562bf68a9f/66429505190.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/61298285129.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_off0000ada0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA0 10648 bytes
SHA-256: 7fa91f708753579a024681fc9a780bd3367353324bfdd5cedca3be88a063d9e8
font_01_sfnt_off0000c5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 14040 bytes
SHA-256: 75f7d414f31c5fb6c92bc730e496b0f0eaa2aded745e5ddaadaa88b4beb21104

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