Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c416e73e328b80a…

MALICIOUS

PDF

84.1 KB Created: 2021-06-29 02:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf68f49248c359cfc2f19f786a5653ba SHA-1: 11f0a4db0823ffc8e0304fdf7ced0ea24481f84d SHA-256: 7c416e73e328b80a43f4ffd687e55e99f67542d88f21ff693b2a2ce837e68e01
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be social engineering via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b889853eb---56587498236.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f2885eea5851688fddca1cb0c8833c66/75746334654.pdf
    • http://pulsarvn.com/media/ftp/file/36401278519.pdf
    • http://basaritarim.net/admin/editor_resim/file/dipakisogomogimunikaki.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae1396e676---54568174185.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5ee349f5---86023890425.pdf
    • http://lavalnerina.it/userfiles/file/zebubejomedoziramukoriso.pdf
    • http://chinasoftcore.com/userfiles/file///33790729474.pdf
    • http://abwplazaview.com/uploads/files/8729349322.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c4638f14---tisosapudopilaxafub.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d83064b3e82d4d7da4de3eb9a0785962/12130946850.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ffb23e3e5---53281037528.pdf
    • https://daulte.ch/ckfinder/userfiles/files/43158024512.pdf
    • http://konemara.hu/userfiles/file/gurevider.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609438bb40c74---20308259200.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2377a0af---fejawajawuwupave.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/558c20937a88e220e01252acaef69592/45626959703.pdf
    • http://vicorsupply.com/uploads/images//files/filaxinulu.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c0e78e1e---19894402235.pdf
    • http://webbuilders.com/files/file/11478989124.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f968f5b4---lumuri.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/0874e1c1f7c66e8130586c45819015a5/mitemusilixiwogeranaku.pdf
    • http://elm3rad.com/file/dadolupavedojekaziwonowa.pdf
    • https://kp-bs.ru/upload/files/2013775585.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=girl+in+room+105+pdf+free+download
    • http://s292376414.onlinehome.fr/datas/imgmail/file/13027930798.pdf
    • 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_off0000e522.bin
8cb5899d9636e96d9eda95cb0bbe2eaca6c72467b4db9dd48e13f462f83f49cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 17256 bytes
font_01_sfnt_off000111ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 16792 bytes
font_02_sfnt_off00012a04.bin
0b5dcc012bf77ed2a926bc8f1e9588b266439437210fc92561123b58a0131e39
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A04 10828 bytes