Malicious PDF — malware analysis report

Static analysis result for SHA-256 d556ed6089b89f88…

MALICIOUS

PDF

67.2 KB Created: 2020-11-23 12:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: aa77657cf523427300de3a1b5a31f2e4 SHA-1: d288bd2b76c3231acc43ba7cffb3ca68ba59b88c SHA-256: d556ed6089b89f884048dae84f61eaecea7255279573284090c67605d05c4c0d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://trafftec.ru/strik?utm_term=world+gk+in+pdf', is flagged as unknown reputation, suggesting a potential phishing or malicious redirection attempt. While no scripts were directly extracted, the presence of numerous links and the ClamAV detection indicate a malicious intent, likely related to phishing or driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=world+gk+in+pdf PDF link annotation
    • https://wenozujilemufo.weebly.com/uploads/1/3/4/4/134456287/f91c30150.pdfIn PDF document text
    • https://xapilupu.weebly.com/uploads/1/3/4/7/134709440/totukodegarika.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/lulolazarefifutemix.pdfIn PDF document text
    • https://tinozuxitijerel.weebly.com/uploads/1/3/4/5/134528375/zadetovoguw.pdfIn PDF document text
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/fufezikipibifaz_xulimumibe.pdfIn PDF document text
    • https://novafexoxola.weebly.com/uploads/1/3/4/4/134400343/6014753.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/kesoxitowosur.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/3822842.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/xamebosoxaz_gawim_gebapen_fasemamoxexug.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/72ab990ecb722.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/rilexazejuzovep/fakonijawimiseletelena.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/tinker_dota_2_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/xogojexi.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/student_led_conference_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/bissell_deep_clean_deluxe_pet_owner_s_manual.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_off0000cb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB12 4896 bytes
SHA-256: 5a0dca9abbd664731f2a75ee09fd0fb26b3700df4ba5c85b5f207efc43090b93
font_01_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 10724 bytes
SHA-256: aaf8408dd9cc5fe7d058b47876352b9f0894b85ebc3c8aad170fce5d2b684626

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