Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a061f37547dd02…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 02:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9794f49f42200f2823a59e48a158be34 SHA-1: f7dcc96e16f7603e7da60203eb498d4274993fee SHA-256: 68a061f37547dd0214e8d2cb64dd38eb88e83955658ae3b2d2b53c0c33c5fed4
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/123?utm_term=simple+subject+and+simple+predicate+powerpoint In PDF document text
    • https://cdn.sqhk.co/rasepotobami/asKBTuf/31114174498.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/juwjfSm/jamzone_bowling_montego_bay.pdfIn PDF document text
    • https://nipixosawapur.weebly.com/uploads/1/3/1/1/131164079/4778524.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/ghihhjn/pirokimovidejitupenaj.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/hijgFje/skyblock_map_1._14._1_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/dYhdRif/sadimudu.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/eijNjgq/29105921896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475215/normal_5fefeec435326.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/iinQhcR/88873845040.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/14dae3e47ec0bc0.pdfIn PDF document text
    • http://rufujatev.iblogger.org/leave_application_format_for_employee.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/aFjbiiS/16589481004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zobawukesilebaf.epizy.com/cricket_betting_pro_app.pdfIn PDF document text
    • http://zexubadisaki.rf.gd/sample_resume_template_word_free.pdfIn PDF document text
    • http://rimalapotozuf.epizy.com/82933740260.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_off0000dfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA7 5628 bytes
SHA-256: d382d6b6d89242c6fecc7581b8402f09789f60b7abaaa14849bf39753d0935ec
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 10404 bytes
SHA-256: 377b6d2daf5b98853ac81c63890bc0a6482a8738ddefe92f275e9cc601d085e0

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