Malicious PDF — malware analysis report

Static analysis result for SHA-256 323ca6120f826106…

MALICIOUS

PDF

73.0 KB Created: 2021-09-12 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f6faa73148e8b5c8cb1c88943f4394fe SHA-1: a86eadd741ef3eea1dbe6ed8e320472d40236f85 SHA-256: 323ca6120f82610615b72cd6e1479f8a782a55e7461df086bb5c1877bbae6659
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a phishing or spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary function appears to be redirecting users to external sites, likely to download further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://inwebjor.ru/uplcv?utm_term=backup+mod+apk PDF link annotation
    • https://moveo-sport.pl/userfiles/file/63633745701.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/30054092020.pdfIn PDF document text
    • http://rem-proekt.com/f/file/nixedazarakenafavikaget.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/56110163161.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/62727039704.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109100507118391.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/96994665754.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138dacd56bb8---xonopabulawo.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/86628472733.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/zejudegafutukaj.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/defalolekizejoweko.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/46750490849.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/komumiruwodumasosuloxumi.pdfIn PDF document text
    • https://okazionche.com/files/5824932439.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/48694818513.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/kukobofuse.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/perizusekixipowazexo.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/45943696705.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/85002318584.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/zokanizenez.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/riketaluxotulebeva.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/18264195578.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/92776040743.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_off0000bc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC03 16772 bytes
SHA-256: f6d05a2f3b198de3e1f8363806931b915fe90fb6f9f288a2af54d1bc14624190
font_01_sfnt_off0000e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 10180 bytes
SHA-256: d563eeaf510cf37abe3069d7da15dca10ddd3669beb02488f2ee04b34ecf1dc5
font_02_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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