Malicious PDF — malware analysis report

Static analysis result for SHA-256 8767ab3545414691…

MALICIOUS

PDF

79.1 KB Created: 2021-06-28 23:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d2f82fc2eac5cdd8edc0dc9ee60619b6 SHA-1: 8f4a4c81b7d1171c964d2d939869adb8935b8a82 SHA-256: 8767ab3545414691889f8c1c70b7c4a2948d581a450379f8e6cead422b8a0765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/74325651636.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607216ceafada---66400314168.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/bd36d439dc0b26498984f6d552141fca/wimugixilod.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160781aad63c0a---47065706628.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/bekedive.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/245de8590e84de2620a2a2db4cddc716/89119792065.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/zofasidafevara.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/11bef26b13e0e70c62be6f1587b8521e/lewajofuwupak.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae27591b57d---kirozijufakura.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8grim8qvel0mubbtbnfvn6t7j0/12991662907.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/8hds3hauc41cqalhm2s0f6lifi/68017821477.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/gezosuzukerimatenowu.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///raxebifulujukezemiwojega.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/53185694918.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/dogegidozemu.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/44290432961.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c73395415568a36730f61c8869f381d7/sapepotepepolesepumi.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/jcf3vd2abu81003hh23rdgal6n/43099964941.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b514818dd32---1988871069.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/8840kbcal90i0eppnkfq6onv1c/48243118759.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f7616cdbd---38052349020.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/8cb917659dae3d5253be36472331bd75/gotobapuviwobamopanamaba.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f31111c56332bf76b7fd4588315998da/tagubedudif.pdfIn PDF document text
    • http://yuha.be/_files/file/tijopogegu.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06a763543---1669901711.pdfIn PDF document text
    • https://t���imi���nph��.vn/category/internetIn PDF document text
    • https://t���imi���nph��.vnIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+unlimited+keys+on+subway+surfersPDF 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_off0000c49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 26036 bytes
SHA-256: 942ad94c0e6c233a7d40d5b7620461b3bac7cebbe74dc107881a74ce2639718b
font_02_sfnt_off0001127e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 11220 bytes
SHA-256: 2fcfc1d4ae010c45b847c82800d93713e2e9a53456bf67b2b1314b9461cf2bc3