Malicious PDF — malware analysis report

Static analysis result for SHA-256 092555fcbdc5048f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-14 11:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 668e15bc02ed076755490f8f9868e561 SHA-1: 0f26275fa96b79c5fe9c8719f8deecd19f72d093 SHA-256: 092555fcbdc5048fdebecc85945f5bb59baba5a96241079c04497dbe9b574a0c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is identified as malicious by multiple heuristics, including a high ML score and ClamAV detection. It functions as a link farm, directing users to various external URLs, some hosted on compromised CMS uploads. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of tricking users into downloading an archive, possibly to bypass gateway security, which is then intended to be opened with a provided password.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://laborke.ru/uplcv?utm_term=android+delete+voicemail+without+listening PDF link annotation
    • http://ain.proximeo.com/ckfinder/userfiles/files/98806839313.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/favekuwamulir.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402ee1b6908---zebekorifenexojesipedek.pdfIn PDF document text
    • http://texmet.pl/userimages/file/71156579649.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/gufukesetubom.pdfIn PDF document text
    • http://domainecomps.com/documents/files/58633253385.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/ce9e02ff0341a7de8ecca12d25be9362/73961768288.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/pirulitazi.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/xixab.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/24003099021.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/20262451931.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cb6c36fd8---59146970989.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109061642186845.pdfIn PDF document text
    • https://izometal.net/mm/file/10255789375.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109111912124348.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/digetofelevidopeledowur.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/zepuxepekesipub.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2bc09145b---niporonakilibibolebir.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/xisinudufupasugije.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/xomum.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/18217669359.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/68760110666.pdfIn PDF document text
    • http://vit-physio.de/file/55371311271.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_off0000d5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 18852 bytes
SHA-256: 75a5c5f68d2c8455ff6540b661597df0478ac0ac03e5cf0465cb8167dbbf48a7
font_02_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 11052 bytes
SHA-256: 5639c968b8fe0ca49e145e01018d3275cfd12948083fbf40097443a7c28dfd74

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