Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d146a5b66886a6…

MALICIOUS

PDF

82.5 KB Created: 2021-09-07 04:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c980d2a0f4382c07594913cb8d9a5956 SHA-1: f4267afcd1889c75f360cc827db9a2a290f71829 SHA-256: d1d146a5b66886a6508c7be231dbc1474042d4e05c371626b70bc870a530ef1b
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/fsukmec51t6v6k0bgncmjaie7s/vumusinuwuj.pdf In PDF document text
    • http://studiofelician.com/userfiles/files/gerazidosaneji.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/tizegozofuregutazawega.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096556923820---joliz.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/57267980992.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/16987944340.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/25910233473.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/66058973859.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc91cd596c---48670080309.pdfIn PDF document text
    • https://mfdesign.hu/files/file/61003431462.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b29709ed9ae---65417463752.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d399d6f2a87---4408110348.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58e079926c---63818493388.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/ba3a62c1be51019a0cea7dbbd0f2aa8c/14257301108.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/99789039838.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/29362853831.pdfIn PDF document text
    • https://shibbirs.com/media/files/60701723480.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c64673084---boduterin.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/99619438789.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/c6h76t778o5rhs1mvdhi8vdrt0/26471098659.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/jupebaxodamanavoben.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/deguwedidomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=faded+piano+sheet+music+easy+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0A 10932 bytes
SHA-256: 63957e9046c98eed8432402cabc2ecdd5af39fa0d1ae62bc92afda3b1913998e
font_01_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C42 18072 bytes
SHA-256: f8e7feb0083dd671826e509123ef20b7a4eaecf6a5d42af840ebf26fb4150747

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