Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c576f047cd9f87…

MALICIOUS

PDF

61.4 KB Created: 2020-12-26 18:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 98c42125d752f6c5c21fd4418605bfde SHA-1: 7603d0ef00b3b0618559d105344c39b0ff505233 SHA-256: 34c576f047cd9f87a1ff783e54f729bad371675a01b1d3fe1f68470405b983d4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of embedded links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier output strongly indicate a malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/123?utm_term=the+ridge+apartments+elk+grove In PDF document text
    • https://tiruzezisuwef.weebly.com/uploads/1/3/4/4/134499189/noveko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f894a360d676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5f920664a5212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444110/normal_5fc802950df1a.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/F7ez2ia/ant_radio_service_android_para_que_serve.pdfIn PDF document text
    • https://kegilosibumu.weebly.com/uploads/1/3/4/5/134513635/33df6c2fce133.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/hfjjhdT/slifer_the_sky_dragon_card_value.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5f97053d38eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5fbbdcd5e939d.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamaweke/TjaJxfy/word_search_free_printable_uk.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/rogugagatuf/84001958060.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/toteginisexurakerebo.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/48129766666.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/81651096772.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_off0000b4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D7 5444 bytes
SHA-256: 39f66999dcc60c52d1cc7a16d197d8443ff14148f236807da1d3c3ab38cf6832
font_01_sfnt_off0000c733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC733 9928 bytes
SHA-256: 6b5ab6fd1968fe895ffe035e4a392f0673a2414a385bd4df8d8adddb62f6d5ff

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