Malicious PDF — malware analysis report

Static analysis result for SHA-256 86415b15d8e953c2…

MALICIOUS

PDF

73.3 KB Created: 2021-05-23 04:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 365f21ccee2e5fcd535ce5803fe41b6d SHA-1: 05d29d1dd261c196597214af173e140470290f87 SHA-256: 86415b15d8e953c20d47679b9fa2f19b01b60e37e8431b24b44322c36b874e9d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://gimoguvi.ru/strik?utm_term=watch+silenced+korean+movie+eng+sub+2011', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=watch+silenced+korean+movie+eng+sub+2011 PDF link annotation
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/zajiwikozufol.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/266898a03c97a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_60596036312c4.pdfIn PDF document text
    • https://xupumoga.weebly.com/uploads/1/3/1/1/131164417/xokazejamefi.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/wezabenifidoxu-tariturasara.pdfIn PDF document text
    • https://japugaze.weebly.com/uploads/1/3/5/2/135295186/vujejajane.pdfIn PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/6403491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_6004608c3e768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_60584b827f702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_6026ebd77f31a.pdfIn PDF document text
    • https://wekopigigosem.weebly.com/uploads/1/3/4/5/134503853/damikipufu_winexowudokipiz_fakupezap_vavazot.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/dbe1f17210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_6035bc919f874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451027/normal_60462ff1ddf4e.pdfIn PDF document text
    • https://turamuko.weebly.com/uploads/1/3/4/4/134458704/warevikogil.pdfIn PDF document text
    • https://vavurozuzen.weebly.com/uploads/1/3/1/0/131070500/xotaleremoxi_lutugegijali_vobuwukesibaz_togezutib.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/jonibenotunaj_koradadebovebi_fulowogumefemo_wikor.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/250100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojaxub/north_face_duffel_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/91281872520.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52E 3048 bytes
SHA-256: 8ea2172ed2e418fdd35dce7762201ba5897a5d8dd5b3bc37e775084a2100406b
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 5956 bytes
SHA-256: 482fb89dd4a3ed25e1e522a0d3d940e5e4f45ec0a32413e68a89944a183c299c
font_02_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 10296 bytes
SHA-256: 44f6f0d1346020be40fd1488944f9c69a261c1bbba61dbcc3ff317197032a54c