Malicious PDF — malware analysis report

Static analysis result for SHA-256 f963c5e272f06d68…

MALICIOUS

PDF

73.0 KB Created: 2020-12-15 01:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5e33c71d1b96b3ca873cc7c565db23f9 SHA-1: 13e3a1fa6b8251b7187f479e5b0350b158304a19 SHA-256: f963c5e272f06d683b2f1846f2575d582ffdc70b58a0de9457c009badbcdc00c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded links are designed to lure users to external sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=finish+the+sentence+icebreaker In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_5fc0755cd9df2.pdfIn PDF document text
    • https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/sevowotew.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/c35ce444744.pdfIn PDF document text
    • https://ronizizuvuf.weebly.com/uploads/1/3/4/7/134707383/wuwizetuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_5fbe1d4d1c149.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/zufanevopigef-moxagi-gejogasizani.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/mopazub.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/josinudage_kefamigomalug_pulopunenalex.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/wepoxupibareg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_5fb5254919f4f.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/28fbae9234d.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/xubadamik.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
    • https://static1.squarespace.com/static/5fc37448e5c7695ca9abd32f/t/5fcf2312798354522d096a79/1607410451366/soguwulebuvubobosi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf565c4f98375720d75073/1606375005142/technical_analysis_and_stock_market_profits.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf1e6888ad70830b9d639/t/5fd6f6cc226e9048facc6d5b/1607923415746/37693289298.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 4692 bytes
SHA-256: 48f97162a97ec08786cff4f564941de9684c16266a1e62e440fbf2097f8885b7
font_01_sfnt_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 9512 bytes
SHA-256: 8d52111019c9803706142b7783aaaf55696624c8d2f0802e7632e60372f391c9
font_02_sfnt_off00010937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10937 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378