Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0275edd7d4fdfa…

MALICIOUS

PDF

83.2 KB Created: 2021-09-11 08:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b5edbebfb02e3ee1a8c489a0e40fd213 SHA-1: 44cb618f1b04b9452ecd897bd24633f771008fe4 SHA-256: 2b0275edd7d4fdfaa48cec93eb2152e08aae0aa3950406db06b9a32038f2d856
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm used to distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://onthespothousing.com/userfiles/file/donowunegasapetotid.pdf In PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/21840492595.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/jubudewomomumamebagivudir.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202195148558529.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/wanaranavidinofujixo.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/xuzatinamodiremapumaruwe.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/lugarezifo.pdfIn PDF document text
    • http://z500.si/files/piwemuferetelozogij.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/88017284685.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9782217860.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/sedaredu.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/zamem.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/wuvabalasoxanekaresegawa.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/zesabamofarosivot.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161352778047d5---wejejusujogemesiwa.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/13760041157.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/10017071499.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/67996412124.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210901_0BA12E3D225AEDAA.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/79977143055.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/28856247371.pdfIn PDF document text
    • http://krupongs.com/images/file/vurobelexuraposaba.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/98008957002.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/94481712902.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/50280064750.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=dragon+ball+z+sagas+apk+download+for+androidPDF link annotation
    • 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_off0000dcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 10824 bytes
SHA-256: 1a4972bf8d9ed9421e836d87dbe7742548e5eee54fb797d155710c29fcc2ccee
font_02_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 18828 bytes
SHA-256: 7f0de39e75b78e710aff668ea260a1ced8cc5a587658148e16697338d5db832c