Malicious PDF — malware analysis report

Static analysis result for SHA-256 44869b54e4b37721…

MALICIOUS

PDF

70.4 KB Created: 2021-06-09 02:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ffc132f48e97cfa8b5a8f14d8de3a7b5 SHA-1: e979c8cd62619f21b9a7b54d83523fe5cf1b744a SHA-256: 44869b54e4b3772104974bf16c77adb8bda499c05961eb8f3b97326ff2b9665b
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, and it contains a large number of external links, many of which point to disposable hosting. The document body, though heavily obfuscated, suggests a lure for movie downloads, aligning with phishing and link farm tactics. The presence of numerous external links indicates an attempt to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://synerhu.ru/pbw?utm_term=tamilgun+new+hd+movie+download PDF link annotation
    • https://tezefuvin.weebly.com/uploads/1/3/4/4/134496048/8928004.pdfIn PDF document text
    • https://sebaderibegagib.weebly.com/uploads/1/3/4/5/134583030/walovetufudunig.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/a9f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_601233797e2b2.pdfIn PDF document text
    • https://lutenidu.weebly.com/uploads/1/3/4/3/134398581/dezap-xogogetig-tasaroneligodo.pdfIn PDF document text
    • https://rusokakes.weebly.com/uploads/1/3/4/0/134016884/8fc521b962.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/kikominulivo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456377/normal_5fdd13bd14834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_602dd91324b5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimepovume.pbworks.com/w/file/fetch/144899337/kannada_rockers_2019_movies_download.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/rexige.pdfIn PDF document text
    • http://kavuruxu.pbworks.com/f/javatpoint_core_java_tutorial_download.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/zusetobitasunalejimona.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144566754/kitap_oku_cretsiz_internetsiz_e-kitap_indir_apk.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144638433/genogram_symbols_template.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/bleach_brave_souls_lvl_200_guide.pdfIn PDF document text
    • http://fisagibop.pbworks.com/w/file/fetch/144778431/54063754393.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144663510/kogojoduvis.pdfIn PDF document text
    • http://kedefoviraj.pbworks.com/f/jugadabab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 5068 bytes
SHA-256: 2b23f99713fb7e6766e5a63a1486c20ae0d3fbc2f63af397e9d59aba45acff50
font_01_sfnt_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 10704 bytes
SHA-256: af0a73397b4c8b4011c98735bd4b326d6cbb6bc01d28dc5846c8feea73395934