Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1200e22b25bae1…

MALICIOUS

PDF

71.0 KB Created: 2021-01-10 18:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 00faace5adbd45cfc7ee5456ba4f168e SHA-1: 7d0f6cd600e6d760a899ae746557fc2c86f51326 SHA-256: 4c1200e22b25bae113be2e6a87cb93d906c0226d3dc5d048260eb6b98e8dd9b9
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The presence of numerous links, including those to S3 buckets and Weebly, suggests a link farm designed to obscure the ultimate destination or host malicious content.

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://traffking.ru/123?utm_term=if+you+meet+the+buddha+on+the+road+kill+him+pdf In PDF document text
    • https://rofunepez.weebly.com/uploads/1/3/2/7/132710772/rifepas.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/Mbhjiby/feasibility_study_of_a_systematic_approach_for_discontinuation.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/wujalepidoxanirol.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/1EvZdjp/glow_hockey_2_player_hd_online.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/5739953.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sixatuzatena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f879f8acfc7d.pdfIn PDF document text
    • https://vesogotupu.weebly.com/uploads/1/3/4/7/134702950/domurofavadut.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/2092662795d09.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/sabobenuwe/654690348.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/coa_certificate_of_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/telimojuvivupitorot.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/autocad_dwg_free.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_off0000d937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD937 5344 bytes
SHA-256: e053ea7a2983f1ce4a4684bf08e5d5f4808b750f65ecad9d68e09d25f29872f8
font_01_sfnt_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 10524 bytes
SHA-256: 76c620aab49925c48b810569176e5866f69433f7864c883fe9a5aceafe0a50a0

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