Malicious PDF — malware analysis report

Static analysis result for SHA-256 0906ae1f596269f9…

MALICIOUS

PDF

85.1 KB Created: 2021-08-17 10:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c9e7b8f246af69304e5f2e1ebea5f71 SHA-1: 77516e127c379d429dca9a5fe28253b655519fdd SHA-256: 0906ae1f596269f9abe186156b916cd50c2bf1de1fb01ef3414b83221e17348d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and functions as a link farm, directing users to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting. The embedded JavaScript likely serves to facilitate the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://tunglamgarden.com/images/fck/file/5003823670.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea91cd358---26554376750.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983416c2802---98865808835.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c10085c3bfb---kixutomenifupubixabola.pdf
    • https://dananeye.com/uploads//files/202108091104134355.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16108b3eb086f5---negutozekakisakebu.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/3701aaa154a096ba454127344cb06cfd/pubivaliw.pdf
    • http://awkontrakt.pl/ckfinder/userfiles/files/sojitujitexatodaro.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/7269aaedda95969982981d70a1bcc8a7/kenikujuk.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bedd2ea11f---nalejukutugokalaji.pdf
    • http://animationcoach.com/userfiles/file/nixikejibe.pdf
    • http://dcbestwings.com/uploads/files/dafiz.pdf
    • http://di-tech.kr/fckeditor/userfiles/file/69481524032.pdf
    • http://aftckwt.com/uploads/file/24487124145.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/42a203a7221b6b76949c90ca4fbc2a8b/88518376364.pdf
    • http://changdahk.com/upload/mekide.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/kasivafofafukivegatidag.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084845504198---jomaxa.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i717a0636otlimrikl7rfuu5te/girinosozaworotu.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/sm1vrrc24tdt64cjb9qg3ronhg/39884230829.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfd07eca8f---35668078329.pdf
    • https://liffeyartefacts.com/fckimagefile/file/gapemekeb.pdf
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/gakitogekaserorivopake.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d75266cf3---xokatumedezudoxibudagi.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a07b93dff9---83876420843.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/aff2e49bbb288631ee087cc74223f81f/xudobofivujunutol.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=video+kartun+lucu+untuk+status+wa
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 16792 bytes
font_01_sfnt_off00010288.bin
e33e16ebfe08d6f5c015fe8b0582e1da997dfabdd26c70f8ea7349c7de3dad62
pdf-font-stream PDF embedded font (sfnt) at offset 0x10288 10608 bytes
font_02_sfnt_off00011af1.bin
5257095f5235e9993887b259cfe4e7c1263bfda874bee45b519893bf8b9fb5ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF1 16632 bytes