Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee43ed12f84a42ef…

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 13:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11aa39378b8e86d0f3d5ae773f41791f SHA-1: e65f2b569c64078eea0df4e2cbc0a1239ca75e3c SHA-256: ee43ed12f84a42ef0654c33a85b8fc2d1b087be92240061a7663359f5575c8f8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to potentially malicious PDF files. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document's content is designed to trick users into revealing sensitive information like private keys or backup codes, strongly suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of many external links points towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 http://pooq-design.com/app/webroot/fckfiles/file/segemina.pdf In PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/movosejetenazoligej.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/musabalojakaz.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/jonamu.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/bopevimerimojiv.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/160243554348.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/54680055883.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/nowewilelelevon.pdfIn PDF document text
    • https://sharenkon.com/files/34241784251.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/85006099498.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/sajikanetevor.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/78231621197.pdfIn PDF document text
    • http://kientam.info/uploads/userfiles/file/19597397307.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613888802b09b---suxuxumebigisan.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/pugodawapefusol.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210906_E12575B54678A1C0.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc182c657b---favomomasesudufu.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/vurasosu.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/96106023649.pdfIn PDF document text
    • http://uteambio.com/upload/files/12982516026.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/bubiributobupujawev.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/27468465881.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=father+dua+quotesPDF 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_off0000db2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 10324 bytes
SHA-256: bb3451691cb219ad44aad355e09484224e6c566e7b0771b2cdf1e71ff40f610e
font_01_sfnt_off0000f263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A75 20500 bytes
SHA-256: 5bb8fcf019a585d5a62326a71fae4e2f73264da6443d138a2903bd17d75dcd14