Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b19c14337faaca…

MALICIOUS

PDF

60.2 KB Created: 2020-12-18 05:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bda6d4e868b9d3f33613c7091752f93 SHA-1: b9918df948b686c3810e33e7bf001cba7fb36232 SHA-256: 89b19c14337faacaf5f9f66a8d9ae9b6eff9e4bfd799ef6e1cc9937b56a202dd
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical PDF_SEO_LINK_FARM detection indicating a large number of external links. The primary malicious activity appears to be directing users to external URLs, such as 'https://traffset.ru/123?utm_term=i+don%2527t+feel+so+good+mr+stark+gif', likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=i+don%2527t+feel+so+good+mr+stark+gif
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/68a82bdd.pdf
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/2bddfcdee8c2f.pdf
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/d0a254741.pdf
    • https://tedojumutu.weebly.com/uploads/1/3/4/0/134042579/4228749.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bd65b852-42ef-4235-aa2c-b0241ae5a191/sunubereziramerimerosati.pdf
    • https://s3.amazonaws.com/zafaronivaj/minecraft_steve_mii_qr_codes.pdf
    • https://s3.amazonaws.com/woxorojero/vunomepazuvobolu.pdf
    • https://s3.amazonaws.com/sikuva/reading_comprehension_5th_grade_worksheets.pdf
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fc57c83eaf37e3b64579ad6/1606777990142/67761248488.pdf
    • https://uploads.strikinglycdn.com/files/736ad321-7bc9-43a0-b712-59708d3bb71e/acronis_true_image_tutorial.pdf
    • https://s3.amazonaws.com/jakujakula/editable_preschool_graduation_certificate_template.pdf
    • https://uploads.strikinglycdn.com/files/e8373b36-542d-4e17-8451-a19f113360cc/thomas_jefferson_middle_school_lodi_nj.pdf
    • https://s3.amazonaws.com/wazotojemov/vupuzakabop.pdf
    • https://s3.amazonaws.com/rimejiguvif/c_f_m_full_form.pdf
    • https://uploads.strikinglycdn.com/files/0b707735-48f7-4780-99dc-88ed65485c04/78225727365.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b030.bin
a955c59bb9a337221f97de5f0a84f74ff09160365f43c510bbdfbd98d9dce769		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB030 5264 bytes
font_01_sfnt_off0000c206.bin
57ab01a3ace4af009fccd0540f31190bf1408d7653bc363534a79763024aa3e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC206 9864 bytes

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