Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebcd496e59fc8a9…

MALICIOUS

PDF

46.5 KB Created: 2020-10-15 08:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 38b435da43b9c885552e3bed7dfb9d34 SHA-1: 78ce3abcbe688e43a3dc75c28546787ac7b11b33 SHA-256: aebcd496e59fc8a922ab243d04f6e5bd7c7ac9a417c031e89f61a35bc59ba75c
132 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?keyword=score+match+mod+apk+rexdl In PDF document text
    • https://site-1038705.mozfiles.com/files/1038705/79949872563.pdfIn PDF document text
    • https://site-1043887.mozfiles.com/files/1043887/38835288535.pdfIn PDF document text
    • https://site-1045392.mozfiles.com/files/1045392/pigegesipajozuguziririgab.pdfIn PDF document text
    • https://site-1039149.mozfiles.com/files/1039149/37936083096.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/16455189983.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/vasoborozalujixiripimesiz.pdfIn PDF document text
    • https://site-1043965.mozfiles.com/files/1043965/19542110962.pdfIn PDF document text
    • https://site-1041181.mozfiles.com/files/1041181/zutimokevaji.pdfIn PDF document text
    • https://site-1040885.mozfiles.com/files/1040885/simet.pdfIn PDF document text
    • https://site-1040200.mozfiles.com/files/1040200/tutofivopaduxutule.pdfIn PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/84720116008.pdfIn PDF document text
    • https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/2011601.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/e7642.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/2752886.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/vovapoxupileve_roxemav.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xereromejiv-koxozirusoror-moxonujis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 5004 bytes
SHA-256: e9dc41629ea789cd3a4e81b896473a849bd2d9b835a1b5558c145e69e4f83d0a
font_01_sfnt_off00007a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 10420 bytes
SHA-256: eaeaffbb8a6c719b70603c7c382f5da0013a581df6585569592c3ba5f607f3de
font_02_sfnt_off00009e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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