Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adbfe628ff507f6…

MALICIOUS

PDF

80.6 KB Created: 2021-09-12 02:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 40e71223b0098648fc99db847c987c09 SHA-1: 608f8792ef897fc7b758f49ac1443c757f8ef374 SHA-256: 7adbfe628ff507f6ce45e16d6c89fc32bf47f984de193b345bafe9d81e1553af
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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://p-energo.ru/content/file/46807972933.pdf In PDF document text
    • http://qapoll.com/2015/vat/upload/files/karit.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/dimobekasodu.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/2950868213.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/15949946806135421b28375.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210909211708.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/87160679659.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/kewogovixojuzu.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/6712089446.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/misuxumesorogomakuronin.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ibd21g7u965i6r5cjcu5tbne6p/73924091533.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/miramamazariwatamutetume.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/59303527849.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161390ecb9dec6---62489715231.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/lomenigama.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/52966686638.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/36415108695.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/2477976595.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/7555381567.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/remiketorojugamutupowid.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/dedudimubelelovutulepul.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/dovikiwev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=minecraft+pocket+edition+download+apk+new+versionPDF 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_off0000d9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 16392 bytes
SHA-256: e6a7d780f3f576fc4b29f180e23666d46226e1337cf9ba2de38b15037b7fb1b5
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEE 10848 bytes
SHA-256: 4be4128157b667faf4362889309a3d4fdce007623e82abc422630f4e72dd9f32