Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dff2c6beae66a7b…

MALICIOUS

PDF

84.0 KB Created: 2021-09-11 05:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: cf855045651e9799e63c9af32b2f0072 SHA-1: 67deb8b25e3647581d16aedc582294d4f2d610c8 SHA-256: 5dff2c6beae66a7bdbcc2793c7ec38d6566d9ef8dad28d019e4eb2d86c0e77ad
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://crysiq.ru/uplcv?utm_term=whatsapp+download+for+pc+windows+7+32+bit PDF link annotation
    • https://securitydm.net/slicice/file/zubujetarijixenas.pdfIn PDF document text
    • http://askort.pl/Upload/file/20850112136.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/jolasexidesowas.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/31208338995.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc88146f64---30230770135.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/45873966490.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/dogigabamugapojusat.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/23663818537.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-11/20210911075928482931.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/mirumuwizot.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/85019368055.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/56970332125.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210911071647618.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0d9d5feb1---xegozuzob.pdfIn PDF document text
    • http://wwstationery.com/files/file/47355149904.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/54935416516.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/41534973815.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/tijefumaxejid.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/bupevibaxonanebab.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/114274872.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/80482445112.pdfIn PDF document text
    • http://ymmicro.com/files/files/metulivo.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/55438214224.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109062312092507.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_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 18012 bytes
SHA-256: 904e9349fea17c7809c6271e7bd003256499178085e58151b569550c36a98506
font_01_sfnt_off00011003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 11144 bytes
SHA-256: 0737efd62c468c7434d1ad8678a45af1fd7352f81dc1c6df9d45b7f3cbb572de
font_02_sfnt_off000129ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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