Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0d1c4efbcb681f…

MALICIOUS

PDF

100.7 KB Created: 2021-08-14 00:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c6e46685dedd69000c4df894d67d0567 SHA-1: 4fe14b30408ae0209f9c71c628fcc61073be78ca SHA-256: 1d0d1c4efbcb681f7ea7d2581ecaee6e04af92a2a301d5caa8f307a1d3f25b12
196 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it contains a link farm on disposable hosting and potentially compromised CMS uploads. The presence of a 'Security software disable instruction' heuristic strongly suggests an attempt to bypass defenses. While no scripts were directly extracted, the overall pattern points to a phishing or malware delivery attempt disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://k12kos.com/ckfinder/userfiles/files/kewemeketetagi.pdf In PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc97053d838---zeletevanogorusaf.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f9dae28f---jojigigigaradivapod.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/qfqo0lktjnri649abf0otj14nd/30705252790.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/adb3bfa5d21104a7151098d966285c11/joduradenovek.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/13994069509.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/85214279830.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/67493377464.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c6d68a1b1---joxipesugaribitinipobiw.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/maseta.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/rewunegafaxekemopibisaxam.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/81051383954.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/dojijapevuna.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e049055f84---9947241984.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609334dbdd0de---jeburov.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/zunelisikijudekinevututaz.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/11606819215.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/judesa.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ffbnoii5cvksc8cn7uvik34p02/50438687247.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/bapasiwujonefegowom.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d3133b96f5309ac84d70819369994de4/kilukivonajazi.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/konemuwew.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/59932762229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=electrical+project+engineer+interview+questions+and+answers+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_off000122ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EC 11308 bytes
SHA-256: b3f0a9bfa95d361ff6fdd7ce93fc0b6fa4d864a4467e83ef559a1f2ea72f9e3a
font_01_sfnt_off00013d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D18 17800 bytes
SHA-256: 04e2d7f94e4c3fe8d59dcb1fe2e3ccd9da97180554cb0f55f2844595bec3c8fa
font_02_sfnt_off00016be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.