Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99cd63068efdae1…

MALICIOUS

PDF

77.1 KB Created: 2021-01-22 17:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: bea8eeaa59b9900b7ef73df181c12dc6 SHA-1: 752c75afd32759ae459fe181af422c9a99357264 SHA-256: e99cd63068efdae133af1e313d45c0b9408f8f788e3baf745b4a521338a016a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a lure related to a Windows installation error, directing users to a suspicious URL. The presence of a PDF link farm heuristic and ClamAV detection indicates malicious intent, likely to download a second-stage payload. The heuristic 'SE_LOLBIN_RUN_COMMAND' firing with 'PowerShell\v1.0\powershell.exe' suggests the document may attempt to execute commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://trafftec.ru/123?utm_term=windows+cannot+be+installed+to+this+disk.+the+selected+disk+is+of+the+gpt+partition+style+windows+10 PDF link annotation
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/1591978.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/nakoketewuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/jhGePnA/how_to_raise_a_child_with_mild_autism.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/6781ba147b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/gfTKjby/30910034474.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/620b7.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/hfgkjcy/potstickers_in_chinese_writing.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/ZjaxYL8/weather_channel_live_radar_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/ligilitojob/TplNtbk/89569243198.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/eLJHjbo/figobupalotorikararo.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/jarawaxanivu/24559063512.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/lejikes.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/guided_tours_krakow_auschwitz.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/58081633797.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/33737849614.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/india_csr_outlook_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/97427656173.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/99603881704.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_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 6052 bytes
SHA-256: 1cf306ba7ce5cfdf28a3d398b0eb40106a78f3ba8f1ef94962f977fee767129c
font_01_sfnt_off0000ff0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0F 11328 bytes
SHA-256: d65a80d6adc53303eac52d10bcacad3f7291616500bf7bc8f6c108cc495d398b

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