Malicious PDF — malware analysis report

Static analysis result for SHA-256 183d814b27320547…

MALICIOUS

PDF

72.7 KB Created: 2021-02-12 15:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 89ab9d3b3575f8a4a06e753e7c8429bf SHA-1: 8d2e668c642f5f7ca22ed33aa5546a43f36ab461 SHA-256: 183d814b273205474079014574570ec9f818af2c63c3950f4ebd6a4b1c1986dc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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/wix?keyword=who+is+the+oldest+in+the+vanoss+crew In PDF document text
    • http://foruzakitotilut.iblogger.org/56332038638.pdfIn PDF document text
    • http://hallop.xyz/aaoge_jab_tum_sajna_ringtone_freeifloc.pdfIn PDF document text
    • http://juvozukatug.66ghz.com/xejokumagidox.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/69140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fe3ff98d4b04.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/65aa571ea846d.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/toxediwotisujej-vesuzezepe-kirowojep-wajezekuwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_60251184c07a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5ff59ee298b7a.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/kefodek/kimapasoguzufojotofa.pdfIn PDF document text
    • http://garulolit.rf.gd/gta_5_android_game_apk_data_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/vuvebakogipida.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_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 5192 bytes
SHA-256: 4deaadd9d3688e5f7af03bfbb901175c17ccc7433c56336146880f43f59018a1
font_01_sfnt_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 10612 bytes
SHA-256: 96be701de132e4fb78afcbeb93b40d1946e0b5f7d948e26a2778e8a024a9f216