Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7eed8bd95977c9…

MALICIOUS

PDF

89.6 KB Created: 2021-07-02 19:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af197387b217d28a94bf60ab681eef42 SHA-1: b2b3c593912fce7c8da45291739d1ef479fc24d6 SHA-256: 1a7eed8bd95977c930dd1c5e0d9c3b50726d798aeadaa53bbccde6c5528cef67
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4720aa086---8619594797.pdf
    • http://youngshiny.com/userfiles/file/1621444160.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/2a82bfa6430627d5e2b20470952c17e9/gonosekivilome.pdf
    • http://riggi.ru/userfiles/file/13629183684.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ca126d9f10c---rijokefupo.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc0f4451c1---88881048029.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160905f491d4b4---13493731764.pdf
    • http://fxmeat.com/upload/file/9646a9dfd24811f72e21a183169a1d8b.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca955f2eda---24153400909.pdf
    • http://botosani.ro/img/uploads/file/xomupixipagunejevovowom.pdf
    • http://www.tomasjelinek.com/img/pub/file/99586632966.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079efe969246---90929250557.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160885cff83e38---26997370753.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e474718df---sadomu.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0a9035559---wiwobikizadatukofi.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b06aee006f9---69443875211.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607234c2511f7---wizur.pdf
    • http://aftckwt.com/uploads/file/gamogazeruxosarelosafuz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gardenscapes+unlimited+stars+and+coins+apk
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 16792 bytes
font_01_sfnt_off000108b5.bin
3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 1672 bytes
font_02_sfnt_off000110a8.bin
226df56e7306c001de7e7a35af92c93b9e39831307ee8f6170f574cdcfe3cea5
pdf-font-stream PDF embedded font (sfnt) at offset 0x110A8 10908 bytes
font_03_sfnt_off000129dd.bin
6e07d702ccba43f68e78a5a732d941d9a9f0694ba036245d45d15dca7a915137
pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 17656 bytes