Malicious PDF — malware analysis report

Static analysis result for SHA-256 49eb29f82e457c7d…

MALICIOUS

PDF

73.5 KB Created: 2021-09-16 04:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32cadcfd4c7b43569858ab5a9f6e01a7 SHA-1: 5c27d566377d8343167262393070270e1d9699b4 SHA-256: 49eb29f82e457c7d3098e34f67c52051d64ac47bacdb4728750b036dd2cb470b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to disposable hosting and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=office+home+and+student+2019+login PDF link annotation
    • http://huyminhplastic.com/upload/files/zezixopaxusomawopejedapal.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427dc7662f8---vaxanivikopilagabedo.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/kaxulekobumomanumagibevu.pdfIn PDF document text
    • https://motoralbini.it/files/file/15529518427.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/puduwiwepibazinovotaniw.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/saviwodafifejudib.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/613243f3e6a5a.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/5970506620.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/murirolofojenir.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/36466485737.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e02d81d299e4ee13a0c423a2b7397c3e/saxokadukofazitibogaj.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/57828431143.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/60846557293.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/faroxafik.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/zipimowidimilekan.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/rolejipop.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109060647574658.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210902_565D578657F31406.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/zebag.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/xuramorabezumunot.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/68849822315.pdfIn PDF document text
    • http://full814.com/upload/files/gutifarag.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_off0000bb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 16744 bytes
SHA-256: d86cb1240bb2a5fc30f6cbd366d8f1a4484b935bad49ecdfbc87dadb8b3f71c1
font_02_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 11412 bytes
SHA-256: d07f0ccdb179609a34c8e2624b3bb1fed608e0e02702858cad6f33c6768c0e7e

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