Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42e7165eb46ffed…

MALICIOUS

PDF

77.6 KB Created: 2021-08-14 01:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 34523d764abc88d58773eabca9d95625 SHA-1: 98d0f63ef99b657c1e7bae9e19fe2be604d4edd6 SHA-256: b42e7165eb46ffed03bce6209006d4e3cf0a44c6cdfc4b386a4b60697ebeaf97
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to facilitate phishing attacks or distribute further malware. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6612

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://laborke.ru/uplcv?utm_term=how+do+the+fruits+of+the+holy+spirit+help+us PDF link annotation
    • http://studiodugnani.it/userfiles/files/17795425115.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/5474ddef234f94094cf525d748fb54af/lukupaganuselejiv.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/rapewu.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/joxefolex.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e381051b6---gikelito.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0202dc4aa1---29653400893.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/4429500209.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1492726de---44329877535.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/1913028774.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/1122007535.pdfIn PDF document text
    • http://berbun.com/user_img/file/dikegeribedopiviburab.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/98573594979.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5cdfa71af9075bd57512275303f1ec19/datogopozorigotafup.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e03e3505b---10351634672.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/zinagupimi.pdfIn PDF document text
    • http://goref.ru/files/file/48233981184.pdfIn PDF document text
    • http://didopack.com/files/vevojomadunopodosudile.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/8120074042.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/t4pi9cgpcfq6kimbl984g0djrp/vivelezaru.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607417fc2cf5f---60238672339.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769522637cf---55501014883.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/63848061b9759f6cd790c293aded5d3d/27811913990.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b4702da4b---renefagej.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/nivenopubesaxu.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/15177621657.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/vesogexevi.pdfIn PDF document text
    • http://tnetimes.kr/upload/file///64560162533.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbd9965f4e---podiwibireroxibexun.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 16260 bytes
SHA-256: 91ab26ff792baaa7f54e4cbf06389d17f152b479f481282cffcba6037c21f748