Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3434359cded8e30…

MALICIOUS

PDF

39.2 KB Created: 2020-10-03 23:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2d2f0bbbf53e11135195b7362e65f141 SHA-1: 57be19b3e2a86f5cc7fdcef92486af3488352127 SHA-256: c3434359cded8e301efd485bc40343457bf1584f1665aa52e92abfbe3edbea45
172 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/strik?keyword=bruno+mars+24k+magic+album+torrent+d In PDF document text
    • http://riziga.lovelocalnashville.com/uploads/1/3/0/9/130969018/3365685.pdfIn PDF document text
    • http://files.richmondinfo.net/uploads/1/3/1/4/131407952/3298912.pdfIn PDF document text
    • http://bifewupa.desertbeagle.com.au/uploads/1/3/1/0/131070588/wamodifuleter_wumon_zukura.pdfIn PDF document text
    • http://files.felizhospitality.com/uploads/1/3/2/6/132683142/4c8ebe126.pdfIn PDF document text
    • http://files.charlesvoysey.com/uploads/1/3/1/8/131857523/wedekuwodituj.pdfIn PDF document text
    • http://files.castletonkids.com/uploads/1/3/0/7/130776619/dosozilobukip-koxogukajej-numaxulaxelenib-basutitiwotigo.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/xijadajosidalud.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/99802561391.pdfIn PDF document text
    • http://katemeba.connexionswdhs.org/uploads/1/3/0/9/130969707/49e9a6b61315f.pdfIn PDF document text
    • http://nakujusi.andersonhealthscience.com/uploads/1/3/1/4/131453501/ragegomusefogi.pdfIn PDF document text
    • http://jifedud.brownfieldmaine.org/uploads/1/3/2/6/132681409/fikerogezemoluwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5193 5732 bytes
SHA-256: 8d35aacf4982275df802f05a1ffe6ff9799d537b11a144fc6cf0a7da531d38e1
font_01_sfnt_off00006502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6502 13748 bytes
SHA-256: 417faf586836e2f415fdd73fc53776097ec0487492007b3da5f2c976a8d162b8