Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2747d60cfae965…

MALICIOUS

PDF

84.6 KB Created: 2021-08-16 03:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ff0ab8e595357a979b1747dd54d59477 SHA-1: e6d5fde0f3922e9b71dc188cbf57dd352efb9a63 SHA-256: 8f2747d60cfae9659700fdbdc6282c3c0a4a90cbe5dc956a0a35466463a5c3fe
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of numerous unknown URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://shanghaiqingchen.com/upload/files/21947791454.pdf In PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9650b1cb6---27326748375.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ea7db0d4---nekevuvip.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/27660819986.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/84463854754.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcb5fb2f14---93599463052.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/52047393815.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160abe81f40bed---xilod.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/63455115438.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/6082957455.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210628_84F4F611E48730BC.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfbac7f00a---83722493893.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/pa4d5kiuu6h0ajtqobcsdhtkn2/pepavajitanez.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/vagixuk.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/9930559344.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/fagujefe.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/nipoguxokumubilaja.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1620973877.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/5989fdeaf3a3e33cf55a8a2494e85cac/16357642466.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609548bdb7b42---99570599202.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/0bb355bb3f033387be8e1d5fe9a4cf89/benejelusolepodujo.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/65264606315.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/30a00abe489457bc102b2a259a982cb6/76180185479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=verbos+irregulares+en+ingles+en+pasado+participio+y+significadoPDF 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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 11120 bytes
SHA-256: 3d1891e8ce87e90103f4be2288e6048f7b372b6b35078dafd9ca4901cea67510
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 17628 bytes
SHA-256: 5c83d04d516cbef85b96a152ca84a33170e009b1906f63053cd6fb8ffbc460ec
font_02_sfnt_off0001291a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1