Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebd0419272adfff…

MALICIOUS

PDF

64.2 KB Created: 2020-12-03 23:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0bbc1a5c8a40a336659ae3fa696b8292 SHA-1: f12529e7c3eae49e7f3e09f6a5abe52c62aaa025 SHA-256: 5ebd0419272adfffc915258cbe8aff04561cfd78bba3ec1717e483b8008c75bb
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware or visiting phishing sites. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

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://ggtraff.ru/aws?utm_term=galaxy+s8+spec+sheet In PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://xufolonul.weebly.com/uploads/1/3/2/6/132695880/nosukabimadogig.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/e0bf7e823ce.pdfIn PDF document text
    • https://ledijomunekivi.weebly.com/uploads/1/3/4/5/134584754/e14920acb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/what_is_a_pathology_report_breast_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/piano_hedwig_s_theme_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/evaluation_sheet_for_training_program.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/lefemitituvumijosifipadu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/terry_eagleton_ideology_an_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/zojizu/19837528518.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/insta_pot_ultra_manual_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/fewibu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/57580361588.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_off0000b325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB325 5320 bytes
SHA-256: 9349a3333222f8d46b9311c1d8389960de397cebf8f68c5f8769a8cfe5ca680c
font_01_sfnt_off0000c54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54F 10240 bytes
SHA-256: e522b2364a57666ed949b7f24e79c12c4757aeb76480acdd1d25da97de51fff2
font_02_sfnt_off0000e870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE870 2836 bytes
SHA-256: 5160b983db0fb22e595e82cf114727c69765381503df32e54c2fd202aad2a7b2

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