Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d36f5ca53d0b0e…

MALICIOUS

PDF

81.7 KB Created: 2021-06-03 19:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f325617f0fea352349757f7ef08d8e08 SHA-1: b982b749ff9c1c099195f67e3ddd76ee044cd5fa SHA-256: 00d36f5ca53d0b0eb73eb39039a7d2ca2d947c590c6bfd3e5d6caa03c113fbb3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The primary URL, 'https://botokaw.ru/123?utm_term=bali+beats+of+paradise+free', is suspicious and likely leads to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=bali+beats+of+paradise+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459025/normal_600f9edd2f3d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5fefda8c59608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_6029f4bf91181.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/xufol.pdfIn PDF document text
    • https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/likavu_sizebuloxa_rixidenikoz_bezewojimimer.pdfIn PDF document text
    • https://ledobosu.weebly.com/uploads/1/3/1/3/131383424/jibez-nemefowi-supivenevuver-rawafu.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/ff5998.pdfIn PDF document text
    • https://dakesobefugem.weebly.com/uploads/1/3/6/0/136056620/bejezu_pelodoxumuko_jamusut.pdfIn PDF document text
    • https://xafokakiza.weebly.com/uploads/1/3/2/7/132710638/toweruguzokeviz.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/losegirat.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4466689/normal_60b29c6056a01.pdfIn PDF document text
    • https://pufenenuboz.weebly.com/uploads/1/3/0/7/130738511/pirogigajevom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_60463b99a75a3.pdfIn PDF document text
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/6223989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5fef4e24069fd.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/wilokezuroxivurexiv.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/dasafa-wenap-dakopufavefarig-witapasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144518964/wondershare_filmora_manual_espaol.pdfIn PDF document text
    • http://gonumutat.pbworks.com/w/file/fetch/144495282/99676676587.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/cells_and_their_organelles_answer_key.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/hyster_forklift_fault_code_168-4.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/69762398152.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 5224 bytes
SHA-256: d58a1b4b57f901c93a2d05bb181015acd1b62f63cf0556d6dffaf9fcb03d6e5d
font_02_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 2160 bytes
SHA-256: 2056fa8838ac7ea902a71969f5de504e465348bd910e58881e1107b6641a2e9a
font_03_sfnt_off00011178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11178 11084 bytes
SHA-256: 0b4fa7914ae323a164a66f42f62bb34389efc6da177aad8b35d57ac56043322c