Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f70c05188decada…

MALICIOUS

PDF

97.6 KB Created: 2021-07-24 17:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fafbb36b984a5b40c22619ba9720ddd6 SHA-1: 455d0f2fdc7b7956df931d2f57145486fb7129f5 SHA-256: 6f70c05188decada036731711a49b5caa1f92820a3ff30c77d3664999ab949e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to various domains, many of which are identified as disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a link farm suggests an attempt to obscure the ultimate destination or distribute payloads across multiple compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://temple.mo/userfiles/file/nesupemikapegezinifuzo.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/625f8d72aef760251fb0604a8b878bc4/xudimuvomipu.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/kizoror.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/dafibugotitilev.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/senukivakajepujigerodolu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609545e8b2a2e---61840423506.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b3a6b0c1d38f29360d25e33a43e725d8/sibelagibikojorej.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/16984682513.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ecgmfvi7h8f1vsn41j9780r0s7/kobivasunozu.pdfIn PDF document text
    • http://pi-consulting.ch/download/76932222952.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/b98pu8i4u48c8cfphapr0b7qk2/paduvubojibuf.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978993e8ff3---27318452036.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/5917239392.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/82501845324.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/isggls9s292ihjk4g9hfmiqhpr/78622906059.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15db582e9d---9395344528.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/2v3lnt6runre9nu4non2soge55/febisulikeb.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/juvaxaputumejalad.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/33061970811.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/76584503811.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a651a6c7d08---pejuzafuju.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210621125640.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/ca2b0d20f5253d1af9c0f2c61e1086e5/wiruwabedajigud.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c7bf359ae5ebf1ef9fe03a65068e691/74361478119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=importancia+del+diagnostico+educativo+segun+autoresPDF 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_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 10972 bytes
SHA-256: 09b81680654d6b59c1d167fc9b0404d2cc33761a0797aadfcccdf1982d7ee42e
font_02_sfnt_off000148cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CD 17816 bytes
SHA-256: 6ddc33aef38c04c1dc9e45906f9b5f526317527f344d9309c8ef1b763e15ea5d