Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bca45113bee377f…

MALICIOUS

PDF

69.4 KB Created: 2020-11-29 23:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6acbdf1b831ef1d46d4faa7bdc6b23a5 SHA-1: e7ca23fced3bf2e4cf5e922315c98ffa2b2945b5 SHA-256: 3bca45113bee377f17cca6d0e763f0c1856635bb010b284cbba0411c0c49947e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a PDF link farm, with the first URL pointing to a potentially malicious resource. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded links suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=blog+template+wordpress+php In PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/3535319.pdfIn PDF document text
    • https://kusuvafivubiret.weebly.com/uploads/1/3/4/8/134888197/9508797.pdfIn PDF document text
    • https://temonobulap.weebly.com/uploads/1/3/4/5/134592988/3729831.pdfIn PDF document text
    • https://xotogulil.weebly.com/uploads/1/3/4/6/134655180/58854b542993d.pdfIn PDF document text
    • https://zumegarilafexiz.weebly.com/uploads/1/3/4/0/134096691/pilefojefewulaneliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_5f9ec07023704.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/pabetutila.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/bulujono/arkit_2._0_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dabaa69-ce7b-4ff9-a20a-a3c8195b1e06/rejololeloneguzuzevu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/crossing_the_minch_bagpipe_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/89435347521.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/preparation_of_ferrous_ammonium_sulphate.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/mortal_kombat_apk_free_download.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_off0000d23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23C 5516 bytes
SHA-256: 263931faceadfd78762b71585f53796bb2436f2d109db01c1c350041d1d405b8
font_01_sfnt_off0000e4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 10616 bytes
SHA-256: 16bfee79fc97510c87a04bc630bff36f4267a9b0a49dcf35b99b9dfb3b226d6c

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