Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62ac4374b379986…

MALICIOUS

PDF

82.8 KB Created: 2021-09-11 01:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 0ab84e1d30e5a2c181f3c9061f92ac20 SHA-1: 829a9afa8d8cf6993cb7b8d649ef9d0452f72624 SHA-256: d62ac4374b379986ddaeb8b938519502bd534f92d28d55ec414cf7aaca0cdebb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://studioguagnoni.it/userfiles/files/ramebebolir.pdf In PDF document text
    • http://hiniceshine.com/upload/fofak.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/bafin.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/12647035972.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/vumodoburag.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/26081158073.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/kumes.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380b838b928---betejala.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/tipubumixawab.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/bumemavurodarokimezu.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/4212072675.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/lopogujepaz.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/63990754635.pdfIn PDF document text
    • http://www.depomatrial.com/file/jubuvepulizawejav.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/13316989932.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/rotifunasijo.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/gagixinajakof.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/xizuredibejowodav.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/pevixofujuxuvufize.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc70d0f76c---xiruduwedotebufotal.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/2876957011.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/nedamexadini.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/xezubixiw.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/tiwekabexexozabitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=when+we+were+lyrics+adelePDF 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_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 18292 bytes
SHA-256: 1935d55bcc9af370fe74f544ca5f50b3114683e62d24c0fa24c9b09e91928446
font_01_sfnt_off00010ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F3 10440 bytes
SHA-256: f5a9ddf9fae99ac5f4a4577b39186ebe71b5ae1458dfadb40c5b8319165368b0

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