Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbc01168567a263…

MALICIOUS

PDF

78.7 KB Created: 2021-07-17 04:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e31f6a7a06e337a8bef30c48dd86bad6 SHA-1: 791fc72333e086970cc62a4742a1f48632b74f48 SHA-256: 6cbc01168567a263d3bd209a40bf9359de6c77691053a8d97858be25ef686510
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/1f27a94f63717bb48ec381ce39a12a7a/bamuzegalomago.pdf
    • https://boucherienabli.com/uploads/FCK_files/file/17724321600.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/8c9b0716f8af9930da485c0aa9d253a4/83852794389.pdf
    • http://t-p-fortune.com/userfiles/file/xexifunade.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33b89ce600---furiwotusawabeduliw.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c5302e5c27e---34828017296.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ef1413d8f---2738066137.pdf
    • http://staceyasp.com/UserFiles/file/mebozavonaveweme.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/27sndukhnm6rv1f6ddj2tb2fje/megadezalawulujagi.pdf
    • http://guojingmall.com/userfiles/file///baxidifakifuburube.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/8708becc3e57e753a8dfd883c13bfff9/70038139550.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca99745ed9---80515078440.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aab9579737---23535693149.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/bf0e0f8c00551b3293439ca03481874b/bizenopix.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/065be5828f99951b24516089a3d3b123/zoresupugoxesej.pdf
    • http://granite1962.com/clients/869125/File/bisosokiruxizuxakaxalopam.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf50950991---76272964770.pdf
    • http://mdsalon.ru/img/lib/file/biwekaletab.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210617193544.pdf
    • http://cosmickino.ru/sadm_files/11714195950.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081350de4e29---22269749830.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4cb876eaf---80444835435.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaccfd5373---jalanedexabuvotigovofumi.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/xiwewedowomigikawuketonam.pdf
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/63515327947.pdf
    • https://oncetrabzon.com/resimler/files/44537856265.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+draw+lines+on+a+word+document
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d144.bin
f3fb543b83b5275e3230c2515c3fdfd37414533d03090841b9774059a0ca9e5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD144 16764 bytes
font_01_sfnt_off0000fcc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 16792 bytes
font_02_sfnt_off000114db.bin
93b82be406860060520ae00c85e46ed0260902fe91bd90e134df90165e5755d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x114DB 10708 bytes