Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b131f449e5d2aa…

MALICIOUS

PDF

75.4 KB Created: 2021-01-30 22:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 618b7bc56b83949ddc0b507e609a33ff SHA-1: 3285a5b10c069f4cbfb49e6e92e6823af72385c7 SHA-256: 63b131f449e5d2aa657d162c8d9370fb801842843be48ed9d6e009b2a159b0ca
252 Risk Score

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=biker%20mice%20from%20mars%20throttle%20and%20charley In PDF document text
    • https://lutaxabivuk.weebly.com/uploads/1/3/0/7/130740512/jibog.pdfIn PDF document text
    • http://lessonsonline.site/youtube_video_downloader_app_mac4guj0.pdfIn PDF document text
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/bfee93228a.pdfIn PDF document text
    • http://mif-smeh.space/wexelejijexmqg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_5fd918ea2c6f7.pdfIn PDF document text
    • https://damowovevibip.weebly.com/uploads/1/3/0/9/130969764/3ee04ea91c0b.pdfIn PDF document text
    • https://rirokenu.weebly.com/uploads/1/3/5/3/135349909/9605662.pdfIn PDF document text
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/4df42b071287181.pdfIn PDF document text
    • http://jobware.pro/23609576492gi975.pdfIn PDF document text
    • https://fatomomome.weebly.com/uploads/1/3/1/6/131606630/nupumeguze.pdfIn PDF document text
    • http://reduslimitalia-official.site/190348343599eyki.pdfIn PDF document text
    • https://pigumetazemebet.weebly.com/uploads/1/3/0/7/130775485/lozofikorufi-jowiwuf-sosawosowazuz-domanataximex.pdfIn PDF document text
    • http://shoop-fm.ru/car_racing_3d_download_for_pc8iviz.pdfIn PDF document text
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/belomumipedenegama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedaremix.epizy.com/4874922033.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_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 5476 bytes
SHA-256: 33580c7c6ca562a497f84da572d3ae8569c1aa178495456e72b79f9a09b20096
font_01_sfnt_off0000fb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8B 10932 bytes
SHA-256: d3ea3bd91f5c34a224d2427bc1743435017ec1506b5ef966acd495f306d81ba6