Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ecb0c040753001…

MALICIOUS

PDF

101.2 KB Created: 2021-09-08 01:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c9a11b28e33984d376c9b033bf4e3b76 SHA-1: ccb327ecb527edc6f4fb9719128949183a0d36ec SHA-256: 86ecb0c0407530017fc96cf3d3200a2a724cac110cefe257648cbbf10c37dec4
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. This pattern suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.1218

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=l%27anaphore+et+la+cataphore+pdf PDF link annotation
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/177e31b3bfd9ebdfe28ae6b8c23c404f/wivomidatitodinisude.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/walakosetodebam.pdfIn PDF document text
    • https://t2sc.me/userfiles/puregeweruzikujimaral.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/41684098807.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/94675440997.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/fuveketujo.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/400b204501dabc267bf3ce18486df137/4848544317.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/69627716868.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/buxarubuxuwafe.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/simifupesolatobanok.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/dnh2q02n7q7ninte6odadc7if6/kovenisewoxexufufowesu.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/nijitariwovajav.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099adee30c0b---33814822050.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/gefuwexopek.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/runojepinuforesokujufob.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/gikiwawojiduvovipeni.pdfIn PDF document text
    • http://108homed.com/userfiles/files/91805094768.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/psrup6epts1mgtvpk7dc6o2clk/6967455227.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/48d6dd11a235637525d537602fc1125b/1334090998.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/34914691646.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/zekexaz.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/35398079648.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/se1i0qasd1uuka26vuj5no3t4b/jasivebirepibabibom.pdfIn PDF document text
    • https://luminex.pl/upload/file/beketukesadas.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3945f75830---9888959949.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/nuvosova.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 22388 bytes
SHA-256: d724e055f8132cc82e06e452a6c78842ea3772ba6745237ffa31a52ceaa90b2e
font_01_sfnt_off00017c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C3A 10448 bytes
SHA-256: 75d9551a9a68a33d294a9d7e7d4fa74cb25ebb8abfd3c11c0084a40a3f12904e