Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8aae37e51e53045…

MALICIOUS

PDF

75.8 KB Created: 2021-01-23 10:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b0cbe67c4483aa83d1c80065df51c00 SHA-1: 6d2fbcf350695eb89db420c937299b69451f50cc SHA-256: f8aae37e51e530453a9d9daa16c48f976f4fbc4c4624197e5e6da7a2317caafc
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://yafferge.ru/wb?keyword=riptide%20gp%20renegade%20apk%20download%20for%20pc In PDF document text
    • https://site-1084156.mozfiles.com/files/1084156/universal_audio_apollo_8_duo_manual.pdfIn PDF document text
    • https://site-1182802.mozfiles.com/files/1182802/microsoft_stream_download_video_with_captions.pdfIn PDF document text
    • https://sipesavuw.weebly.com/uploads/1/3/4/6/134697333/8af74c8c3.pdfIn PDF document text
    • https://site-1173983.mozfiles.com/files/1173983/i_gladiatori_albavilla_menu.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/vawagumifuxini_welaruzerufijap_dibukufuxe_kududevalumog.pdfIn PDF document text
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/minalugegeroto.pdfIn PDF document text
    • https://site-1215232.mozfiles.com/files/1215232/ludumujadafemusika.pdfIn PDF document text
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/062d82490c3cb3a.pdfIn PDF document text
    • https://fekamudubop.weebly.com/uploads/1/3/5/3/135325245/7741142.pdfIn PDF document text
    • https://site-1172455.mozfiles.com/files/1172455/castle_of_illusion_starring_mickey_mouse_sega_rom.pdfIn PDF document text
    • https://dewapapowirise.weebly.com/uploads/1/3/1/4/131438248/86022e29.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/dazuxujepov/73278212529.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/kipufalivutivatozoja.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/navbar_apps_pro_apk_3._0.pdfIn PDF document text
    • http://mutidulofof.epizy.com/chrome_os_for_pc_32_bit.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_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 5308 bytes
SHA-256: 732029e11828482386b1ddb4085e5bb342d482e158331fd10548832ee114a668
font_01_sfnt_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 10512 bytes
SHA-256: 95506824ccb222008c714ec9cdadda73b20945c1a1e164ab216b5226ed8f1c85