Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ec05bbd250054d…

MALICIOUS

PDF

79.5 KB Created: 2021-09-19 23:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 890c84ee6d00afb300e2d0a3407518bb SHA-1: a580bf4c42bd88c4c135c46127a387259965c526 SHA-256: 89ec05bbd250054db0a35eb1ef943c8922a053390392dbd6454de79d1380bb9b
134 Risk Score

Malware Insights

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

The file contains embedded JavaScript, a common technique for malicious PDFs to execute code or redirect users. It also contains numerous external URIs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://ketchas.ru/uplcv?utm_term=best+apps+for+rooted+android+xda PDF link annotation
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/8c8900e47fe310d59639c2e208f2be92/xukudisozowanakivifawatix.pdfIn PDF document text
    • http://sbkf.org/files/files/27881690499.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109030602323455.pdfIn PDF document text
    • http://szpk.hu/_user/file/38890476771.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/50356324651.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/98723664817.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/xalefiwimepametumum.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/10893882451.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/fimeruditaniwuxobib.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/jiwezerujamabakobegekil.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14371427419.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/2d422733931c0481c0dd8ade60d33cc8/gakisidoturob.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///74364714346.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210901104541.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/74405970350.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/relobaguroxeloxom.pdfIn PDF document text
    • https://urologasdainys.lt/userfiles/file/10709622904.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/54544329182.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/26406097588.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/suxuzusemolanidewirimis.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/gegorezilelu.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/gusupibi.pdfIn PDF document text
    • http://malifer.hu/upload/file/wazimewomugisogawalej.pdfIn PDF document text
    • 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_off0000d2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 10600 bytes
SHA-256: 7059174d1236938cd3c87c9d0a949608749d216f6131eddf3e9a72f6660aa189
font_01_sfnt_off0000eb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB23 17412 bytes
SHA-256: b633576230b93b881acbab6c87cb17be988b71659194fb8b0480faf8dee98a96
font_02_sfnt_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1