Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c12f07870dcb67c…

MALICIOUS

PDF

90.7 KB Created: 2021-06-28 13:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4cfe61a4ac96e90a9846ff16ffd061ef SHA-1: 06378ad7ba54065d3ad256ca781f697a8f10e360 SHA-256: 4c12f07870dcb67ca5bbc39ce72cea1930cb68552248364d3e7d3abcc3c8deee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload locations and disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to phishing or malware distribution sites, likely leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/52577fa13b0c807f22b0a84e58117f76/29000937836.pdf In PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0b73620c---rarefoxabajozusojup.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/kcialt2c27l7e53kc5p6vckd4k/difisavodinisufideve.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd68562ad2---zedorajonarepabewurifixa.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///11495555888.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608534980b691---wodarejoj.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jigut.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4be15be6f---81718446103.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rm6lok4veot8e8ulbq8nklm2o9/43887450241.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/43325548980.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ded91f1fb101edd9c7409b3de2840d46/62452513582.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdfc03d0ac---zefalozeb.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/wilosi.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607898a525825---72350870043.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/53888861620.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a146044af2---taxaxobisozorekiperope.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/17807938129.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/111842339785.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9a31b11cc6f3fa67f113c410dc4a7b2c/wanapuzewolar.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/55132762874.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a925fcad850d63e02c76ed5be105413a/41983396778.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/240be8220dc0489243090ae956951b77/zitome.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/18828ecb6b2c0b13255716d44bdbdbcc/nagoxipexowodatomeb.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe9e42f2c---magesexibenukaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=contractionary+policies+are+policies+designed+toPDF 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_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 18060 bytes
SHA-256: 5801239b9df99fd91ef170170c0557f315b29cb305aecfb1d878c5fd956c3f5a
font_01_sfnt_off00012c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C36 10832 bytes
SHA-256: 815761c6946166e60136e4645db03c1777228c6f029bf309456d30df2360e728
font_02_sfnt_off0001452d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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