Malicious PDF — malware analysis report

Static analysis result for SHA-256 341728801b76700e…

MALICIOUS

PDF

78.1 KB Created: 2021-09-24 02:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d25d49fec9b2fb4c88074867f8eb67b1 SHA-1: 58397ba82d631a8d5cec035628eaf1aab50fcb2e SHA-256: 341728801b76700eeb709cf72208feafe63fa35598e832a2a75aa46af4ebcab4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised CMS uploads. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain sequences that mimic command execution, further indicating malicious intent. The ClamAV detection confirms this file is recognized as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=best+react+native+components PDF link annotation
    • http://pwmtqatar.net/userfiles/file/zukuxateku.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/23897139126.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/bosuduj.pdfIn PDF document text
    • http://pi-consulting.ch/download/20312870612.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/wirajiniruvenoworonu.pdfIn macro / runtime command snippet
    • http://hunting.kg/userfiles/file/fator.pdfIn macro / runtime command snippet
    • https://andhimazhai.com/images/files/panasimawumuvasilemigo.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/42593654162.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/muzuziletazaxixarokaba.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/77157222315.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/53460898484.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/26522655837.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/89618675140.pdfIn PDF document text
    • https://everestart.com/images/stories/file/1624936193.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/7849331571.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/d8gn5oubb0vk22s7fs0onur3f2/36275186186.pdfIn PDF document text
    • http://annuaire-regional.com/ckfinder/userfiles/files/goxogoxofi.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/vaduxuvufojelupodaj.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/rotusirogew.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403fed781ca---bunufifopon.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/nenoxekowevadelozudur.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/30f9ff31e9bf5449873254658cc04db6/vamexomusodabefif.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/682f36c0e2dd9b2aeeda1e05abec920d/78529405470.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/3776609987.pdfIn PDF document text
    • http://pi-consulting.ch/dowIn macro / runtime command snippet
    • 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_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 10608 bytes
SHA-256: 208c6049265b46d231aa7046d16bb2c046670149e501c126d7e073a4dcd3a502
font_01_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1