Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aebdaebe3c69d09…

MALICIOUS

PDF

86.6 KB Created: 2021-09-13 10:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 9e49d4d458f7283321d363eb2393f053 SHA-1: cd4f557c2d2520b40c9d9ecee641ea50a311ca56 SHA-256: 7aebdaebe3c69d0957958c235080f1508dbef50d7864caaea042120022b793a1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=android+lento+e+travando+o+que+fazer PDF link annotation
    • http://intelekt.biz/uploads/pages/files/zunulopepibowol.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/38868154894.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/fejis.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jusuxugunafivezekukax.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/98037377675.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/71007130369.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/vixuxakiligigawebapaxuw.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/tuvirekawikajamadavugigi.pdfIn PDF document text
    • http://posuni.com/userfiles/file/damewuwerug.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/korowukikexuwiwururod.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/duluzejetaxijiwudadage.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613469209031e---20724170752.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/masebaduw.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/10844331783.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/bamesezamusikedarita.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/47527780360.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/6165897194.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/50029926630.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/zilidajafumojakave.pdfIn PDF document text
    • http://sudeoksa.org/userfiles/file/20210909002234.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/61498783875.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/24150568841.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/56858714883.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/jukefimokizevojufo.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/sipikilibeki.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_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 10532 bytes
SHA-256: 700cdb63f7d344c8fd90d6fcd8146dbb63f425ccf89d320cabe315c83afb0129
font_01_sfnt_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 20368 bytes
SHA-256: f6a2076e40cef128ae3ba84969b926e556d41157b8fd9977ae95cde2d4cbf215
font_02_sfnt_off0001327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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