Malicious PDF — malware analysis report

Static analysis result for SHA-256 449b82ae418eb01e…

MALICIOUS

PDF

89.4 KB Created: 2021-06-01 20:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 30e4da5df33a80c22e989c5903e584ee SHA-1: eafb356f988ddd4e1d700f03ed55f444c7cf394d SHA-256: 449b82ae418eb01e4962d1f68c7020f71950959187b2d62b77767ae6f296031d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/123?utm_term=ahan+inna+chords PDF link annotation
    • https://zamigemunizi.weebly.com/uploads/1/3/4/3/134347724/dufivukifowisaxufom.pdfIn PDF document text
    • https://pajodutakimileg.weebly.com/uploads/1/3/4/4/134474341/lakonig_guvoxofojevone_lexipuwez_wimogok.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/wakefenebofewewuv.pdfIn PDF document text
    • https://vonipelimodaro.weebly.com/uploads/1/3/0/7/130738487/zonotabetiwa-zapogela.pdfIn PDF document text
    • https://fusajowaxoxa.weebly.com/uploads/1/3/5/3/135344195/8616010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_606caf582e1c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_600132d77e706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_60445694b3cdd.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/fbc0f62d6fa.pdfIn PDF document text
    • https://jatuvukaxakepu.weebly.com/uploads/1/3/4/3/134313635/648031f.pdfIn PDF document text
    • https://xarokonamofa.weebly.com/uploads/1/3/6/0/136092779/datumosazefew_xajafaguj_jakafilo.pdfIn PDF document text
    • https://rifuvosibimav.weebly.com/uploads/1/3/5/3/135383082/2428b7a6692.pdfIn PDF document text
    • https://tomojuvugitem.weebly.com/uploads/1/3/4/4/134475437/6997897087f5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_6027922255ee7.pdfIn PDF document text
    • https://dununatanag.weebly.com/uploads/1/3/0/7/130775655/f3ba2df469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_606914bfd656a.pdfIn PDF document text
    • https://xafijedalab.weebly.com/uploads/1/3/0/7/130775792/85eaf.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/kilunepewulitato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusawijer.pbworks.com/f/toggle_mod_combo_for_mini_militia_download_apk.pdfIn PDF document text
    • http://ganosidil.pbworks.com/w/file/fetch/144456018/how_to_reset_2012_honda_odyssey_radio.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144447198/besabefiwotafevexiwelal.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://scripts.sil.org/OFLIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 4984 bytes
SHA-256: 47e51acfe1d6058173d1ed7de007e9d513733dd53298f8cc8ee491680cf76bbb
font_01_sfnt_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 29184 bytes
SHA-256: 6b84aeccdda11124328662a578018e770651662123b25bc95757f310e520ecbe
font_02_sfnt_off00013066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13066 12340 bytes
SHA-256: f6d37da39d1f919530e43578d9a827805cdfb226cde5d475fb4fea3af2fbf720