Malicious PDF — malware analysis report

Static analysis result for SHA-256 e265f6b0d60e4925…

MALICIOUS

PDF

84.6 KB Created: 2021-08-25 23:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7d1630b795d31d958180ef750391ceea SHA-1: d9b8e1818820e4a1917a27933b7170e57dfc9d0e SHA-256: e265f6b0d60e4925f70209ccd9992588f0aa213239d6b58d43156f4a3e56fff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://aggengr.com/uploads/CMS/file/wodesefafupode.pdf In PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9aa687994---getujolegeb.pdfIn PDF document text
    • http://rentaruedas.com/files/others/girinud.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/72916144669.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7e07552128595a0f230c51c69122b8eb/1111749032.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/bf9o6ddvln0hsvit0j2vmpoqj5/vituw.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac14ed17d44---49736996287.pdfIn PDF document text
    • http://kinocosmik.ru/sadm_files/zotosulotuxerofoxozu.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609af572336e7---23288822403.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bfa9fe23---3924441172.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/tikazanujutipolimetefe.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4e9b6bc3c4ba4a43d96f159e6414134c/19042197058.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d90441b2ef---77092292673.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/salegekedutobukufufitexaz.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/54396847895.pdfIn PDF document text
    • http://shophouse.info/images/files/19676118921.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021825235841663.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/8e9c4d828ceb28223b0477b9a11ac966/pobivubed.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/runodonabubasomebize.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/zodez.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/konikezijekeg.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/46133476445.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/jejininadewoja.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079377d94f94---18824504552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+ultimate+friends+quizPDF link annotation
    • 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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 10768 bytes
SHA-256: f2a6bef057b52db83e55c87d5951fb88692a6deb80301a9fd6e99f101b13a280
font_01_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 18044 bytes
SHA-256: f4ce59c3460960f3e7b32fc5922bb1bf235c38202af79112e97495851587e5aa
font_02_sfnt_off00012bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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