Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2309abc1e3deca7…

MALICIOUS

PDF

81.2 KB Created: 2021-09-18 13:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5714accb322d58a459ccc90e499172c7 SHA-1: 3da61faefc7d3d468da3b7f3418c8d187ed56808 SHA-256: a2309abc1e3deca7bb9ccc87c169875563e18c694d63f7be44fb1a53803be08a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://infrive.ru/uplcv?utm_term=toejam+and+earl+for+android PDF link annotation
    • http://krupongs.com/images/file/kigibosavogonazebeg.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/26262027668.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/pomazatakadakiwe.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631283470.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/17261307582.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/871a2ded2e77d0defcf9c1679513e49a/28071894953.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/pamuporuxizule.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7aeee69eb---60629355062.pdfIn PDF document text
    • http://seamacros.com/upload/file/lugativezamawokagulujidep.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/zefogerekevipipumidazolu.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/25870992100.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/76171442640.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/35386946108.pdfIn PDF document text
    • https://gangnampools.com/contents/files/vamelekibexi.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/f67d617da48468a1ed91979f43e9fec3/89462980952.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/mikanawinalitate.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/birozojexajak.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/37012453230.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/bazokexisapejesirur.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/jogiloxosarulokef.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/93011028827.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/11885665268.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210905011148.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_off0000d534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD534 19256 bytes
SHA-256: 92cccbff26147360af928630fb3083465754756d34b9e96d4ad303440ef85652
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 10344 bytes
SHA-256: fcc328ccb66a783f75774235bc73bd220d8fac41716e93dc71e854b8b8d453e1
font_02_sfnt_off00011ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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