Malicious PDF — malware analysis report

Static analysis result for SHA-256 e666be9b319be22c…

MALICIOUS

PDF

82.3 KB Created: 2021-09-12 17:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aa48876e127d77732b819575716e0fe8 SHA-1: 558344f2761b0f77bdfb100b38b693e9367af803 SHA-256: e666be9b319be22c9c00318ff5eb8e1c7a97fdb9d5edbfc5344c4d36a4bbf5b3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the large number of extracted URLs suggest an attempt to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://gainliving.com/upload/editor/file/pigagejuzabegesasadel.pdf In PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/583a3b5e5b1b963ae3e35e8f645a132c/morel.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/xewuxapazefuviroxamizo.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/78970679455.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/38201366763.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/30932450356.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210901_971C061AC63B223F.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/52979039582.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/82303162406.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/fojidofobeziratekisepod.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/muvemakabiledazolasized.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136abb96590f---lafis.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/5809319274.pdfIn PDF document text
    • http://mundialimportweb.com/userfiles/file/41362546543.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/fazinop.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/47783310003.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/zimanedafa.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/15866869866.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/34962477121.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/mivajegebamomaze.pdfIn PDF document text
    • http://labsshop.com/d/files/sefedonoli.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/92408071287.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/fufokasuluw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=art+of+war+legions+mod+apk+2020PDF link annotation
    • 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_off0000d4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DE 11240 bytes
SHA-256: b4cc0f3351a0c79416203b902f6acfb148e8568965755fc30a602d95452ff2c6
font_01_sfnt_off0000ef13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF13 20500 bytes
SHA-256: 901754aa88cd9f19464927b8b65fbb5c78f3f5827e5bfbf6507d8ebb9c9c17c5
font_02_sfnt_off00012409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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