Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9eb080468aac06f…

MALICIOUS

PDF

68.3 KB Created: 2020-12-26 11:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7ebb9a872db61742ec7319f301d87a2e SHA-1: 39fcc7f09e6cead2cc42c213c8caf24b6226bfa7 SHA-256: d9eb080468aac06fbd42cf2d84d4c565dbf595fab771cf3b9048f82eb548d192
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged the file as malicious. The presence of numerous external links suggests an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=poema+para+mi+novia+enferma In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459321/normal_5fdaba55a1706.pdfIn PDF document text
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/7ee4f2.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/34c2ec4c552d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5fd95c5e68e6f.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/3477553.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/lakadutof/apache_cordova_visual_studio_2017_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170472bd-2d7d-4cae-a97c-0b63ea8f5e45/86412659530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4571ae1-cac9-431a-a7bc-e2e2ee5706b7/apex_legends_memory_could_not_be_written.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/structure_and_bonding_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/61774358226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a3e819-c291-4e75-8b95-8cf56f5b7c0e/what_is_thamo.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/38572110803.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/breakup_mashup_2014.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_off0000ce8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8F 4900 bytes
SHA-256: b87700371c6f7b96e118e9964879448d62fb697a5f6ec71378145dc961169811
font_01_sfnt_off0000df29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF29 10856 bytes
SHA-256: e7c4927738c9d40f4a5de4fc4b8be6b9be13b731a46920fe862b979a6558c4b9

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