Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ead79d416a3a7c…

MALICIOUS

PDF

69.5 KB Created: 2021-09-26 02:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b8d46069e2889942b2c94fa1c34a2460 SHA-1: 1e8d59256ea1dc2e2597e5e8bf5986f03b514dc4 SHA-256: 06ead79d416a3a7c2d312b8cfb030bcbfda4d92750daba4c45f6b0bdd159ef83
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm directing users to numerous external URLs. The presence of 'LOLBin token sequence in document text' suggests potential command execution or exploitation attempts. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly imply a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • 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://garglob.ru/uplcv?utm_term=a71+5g+screen+size PDF link annotation
    • http://broadviewlibrary.org/uploaded_bvlib/file/majojasujatozexa.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/zelinexe.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/33994279608.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/99153899360.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/85574138289.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/7344138599.pdfIn PDF document text
    • http://partiaweb.ir/upload/files/67811896161.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/27148005848.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210923_011021.pdfIn PDF document text
    • https://emenu.hu/editor_up/32959838437.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/tafoxorefisolotona.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/bikegulupo.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/jojosopalimiwe.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161440279271eb---rolenama.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/8f3kipttm2aj0eoubcmdbclr30/70001176139.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/56773748784.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109231401232354.pdfIn macro / runtime command snippet
    • http://librojuridico.com/aym_images/files/gekuxopafober.pdfIn macro / runtime command snippet
    • http://cesishotel.lv/res/wysiwyg/file/99689500342.pdfIn PDF document text
    • https://cabinetscounters.com/ckfinder/userfiles/files/86120538127.pdfIn PDF document text
    • http://parentini.it/userfiles/files/gupikipevaberijiwevinu.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/27631076297.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/8364992700.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/tegovare.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210911231656707.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/useIn macro / runtime command snippet
    • 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_off0000b066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC878 16008 bytes
SHA-256: fbeac722cc8df74e529ccf002378462bd46edb91a34b1e1542d43ddd0043b421
font_02_sfnt_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 10256 bytes
SHA-256: 52f505a8261140cf54b8be458e4df514d04b5b6435e53b0f474904755ec065af