Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dbb222d6f5d589…

MALICIOUS

PDF

87.4 KB Created: 2021-09-23 11:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f9ecd23cea510ff3c1df0fc29794ea42 SHA-1: 905e80c3bda840355eed4c9598c7d1992ca69826 SHA-256: 48dbb222d6f5d5890db58c5b3c5ed217d43dccc6c0dc78f3e1f026ea2935c590
196 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior, as indicated by ML classification and ClamAV detection. It contains numerous links to external websites, some of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The critical finding is the explicit instruction to disable security software, a common tactic to bypass defenses and facilitate the download of further malicious content, likely via JavaScript or PowerShell.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://allytemp.ru/uplcv?utm_term=what+can+you+do+in+minecraft+bedrock+edition PDF link annotation
    • https://shirbandifelt.com/userfiles/file/sojaxamomaf.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c949372b3---sudubekenaduma.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/ziveparokesokazexelewenen.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/88893459392.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/652073087.pdfIn PDF document text
    • http://net-marketing.hu/images/files/lixejuzozozumixigusa.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/wizojovoxurorefefosir.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/12846648344.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/gefetilumolekoresuneworid.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/mixoz.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614211eb5890f---62318637691.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/40728795438.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/33145125154.pdfIn PDF document text
    • http://eva.am/files/7f8a51c3553e16a3.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/soxesuxijuri.pdfIn PDF document text
    • http://jvmont.eu/userfiles/file/29280153122.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/kemumeroxesepuxus.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/60548542244.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/xolatefojivenixom.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148e89dbba5e---wulega.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/61084130575.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/14755655335.pdfIn PDF document text
    • http://fgosvo.ru/files/files/gavib.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16147ddf974a98---54332983266.pdfIn PDF document text
    • 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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 19100 bytes
SHA-256: 7cc249f774e7734a56b3bc0786d69bf597fdd6804b80fb458317f5228ef248cf
font_01_sfnt_off00011e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3B 10964 bytes
SHA-256: 7eb18573c6df7e1c26356296d7635c4da107dc0690d0f315aadd3b82c91e4544
font_02_sfnt_off00013789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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